I deleted Instagram on my phone three months ago.
Here is how it happened. I started checking my screen time reports. Not once. Regularly. And Instagram kept showing up in my top five apps. Week after week. I would look at that number and think: what did I get from those hours? What did Instagram give me that moved my life forward?
Nothing. It gave me nothing. It gave me other people's highlight reels, ads for things I do not need, and an algorithm designed to keep me scrolling past the point where I wanted to stop.
So I deleted it.
Once in a while I reinstall it for half a day. And every single time, I catch myself scrolling, look at the clock, and think: this has to go. And off it goes again.
That decision did not come from discipline. It came from understanding something about how the human brain actually works. Something I wish someone had explained to me 20 years ago.
Your brain has 7 slots. That is not a metaphor.
In 1956, a cognitive psychologist named George Miller published one of the most cited papers in the history of psychology. The title was "The Magical Number Seven, Plus or Minus Two." His finding was that human working memory, the part of your brain where you actively think, process, and make decisions, can hold approximately four to seven chunks of information at any given moment.
Not four to seven projects. Not four to seven tabs. Four to seven pieces of information. Total.
The science: Miller's research established that short-term (working) memory capacity is approximately 7 plus or minus 2 items. Subsequent research by Cowan (2001) refined this estimate to approximately 4 chunks for most adults when rehearsal and grouping strategies are controlled for. This capacity limit is considered a fundamental constraint of human cognition, replicated across thousands of studies over nearly 70 years.
In plain English: Your brain has a tiny workbench where all your active thinking happens. It holds about 4 to 7 things at once. Everything you are currently processing, deciding, or worrying about competes for those slots. When they are full, new stuff pushes old stuff off the edge. Not because you are not smart. Because that is how every human brain is wired.
Then in the late 1980s, an Australian psychologist named John Sweller built on Miller's work and developed cognitive load theory. Sweller found that people fail at complex tasks not because they lack intelligence but because their working memory is overloaded. He identified three types of load competing for your slots.
The science: Intrinsic cognitive load is the inherent complexity of the task. It is determined by the number of interacting elements that must be processed simultaneously. A task with many interdependent variables has high intrinsic load. This type cannot be reduced without simplifying the task itself.
In plain English: Type one is the real work. The hard thinking. Strategic decisions. Complex problems. Creative solutions. This is the weight you want on your workbench.
The science: Extraneous cognitive load is imposed by the environment, not the task. It is generated by poor information design, unnecessary complexity, fragmented systems, and inefficient workflows. It adds no value and can be eliminated.
In plain English: Type two is the overhead and noise. Switching apps. Compiling data. Reformatting things. Scrolling feeds. Absorbing news you cannot act on. This weight adds nothing, but it eats your slots.
The science: Germane cognitive load is devoted to schema construction and expertise development. Schemas are mental models that allow experts to process complex situations with minimal working memory demand. Germane load is productive and represents deep learning.
In plain English: Type three is the deep learning that makes you better over time. Pattern recognition. Building instincts. Developing judgment. This is the load you want more of but rarely have room for.
The science is clear: minimize type two, manage type one, maximize type three.
But here is what Sweller studied in classrooms, and nobody has talked enough about in real life.
Your slots were half full before you opened your laptop.
When I was in marketing, I came across a stat that the average person is exposed to somewhere between 2,000 and 10,000 marketing messages a day. Billboards. Push notifications. Email subject lines. Social media ads. Sponsored content. Podcast ads. The logos on your clothes. It is an insane number.
And that is just marketing. Layer on the news cycle. The TikTok algorithm. The group chat. The Reddit thread. The podcast in your earbuds while you walk the dog.
The science: Research on incidental information processing (Lavie, 2005) shows that humans process environmental stimuli even when irrelevant to the current task. Studies on attentional residue (Leroy, 2009) demonstrate that switching between information sources leaves cognitive traces. Thoughts about prior content continue to occupy working memory after switching. The news you read at breakfast and the reel you watched on your commute are leaving residue that competes with work-relevant processing.
In plain English: Your brain does not cleanly close tabs. When you switch from scrolling to working, part of your working memory is still chewing on whatever you were just looking at. You are not starting your day with 7 empty slots. You are starting with 3 or 4. Maybe fewer.
That was the realization that changed everything for me. I looked at my screen time data, I looked at the science, and I thought: I am voluntarily filling my brain with noise and then wondering why I cannot focus at work.
Instagram was the first thing to go.
Here is what I actually care about. Everything else is noise.
Family. Career. Health. Outdoor recreation.
That is my list. Four things. Everything that does not serve one of those four things is cognitive load I do not need.
I do not care about the latest pop culture trend. If you took me to pop trivia I would fail miserably. And I am fine with that. That information does not deserve a slot.
I do not follow politics closely. Every four or eight years that seat changes. I cannot react to every headline. Either figure out how to work within the current situation or wait for it to flip. The media is designed to make you upset about everything because upset people keep watching. That is extraneous cognitive load dressed up as staying informed.
I watch maybe one hour of TV a week. Usually on Sunday nights. Whatever Yellowstone spinoff is happening. And even then, I am usually working on something AI-related at the same time. Guilty pleasure plus skill building. If I am going to sit on the couch, I am at least going to use part of my brain for learning.
I care what my partner is feeling. I care how I feel. I care that I am hitting my targets at work. I care that my team is motivated. I care that it is a beautiful bluebird day and I get to ride my bicycle or walk my dog.
That is it. Everything else is noise. And I am removing it.
This includes people.
Whether you realize it or not, you have people in your life who are cognitive load.
I have done this most of my life in a weird, instinctive way. But now I am hyper aware of it. When I find someone who is a drain, who fills my slots with drama or negativity or problems they have no intention of solving, I have to remove myself from them. Or them from my life. Whichever way it goes.
This sounds cold. It is not. It is the recognition that your 7 slots are all you have. And some people, no matter how much you care about them, are taking up slots that could be used for family, career, health, or the things that actually matter to you.
You would not keep an app on your phone that drained your battery to zero every day. Why keep a person in your life who does the same thing to your brain?
You do not have to do what I did.
I know how this sounds. She deleted Instagram, cut people out of her life, only watches one hour of TV a week. That is extreme. And I get it. Not everyone is wired this way. Not everyone is in a position to make those moves right now.
But here is the thing. You do not need to overhaul your life to benefit from this science. Start with one slot. Just one.
Look at your screen time tonight. Find the one app that is eating the most time and giving you the least back. You do not have to delete it. Just notice it. Set a timer for it. Reduce it by 15 minutes a day. See what happens when that slot opens up.
Or find the one commitment you are carrying that does not serve your priorities. The committee you joined out of obligation. The recurring meeting that produces nothing. The side project you said yes to six months ago and have not touched since. Close one loop. Feel the weight come off.
The science works at any scale. Clearing one slot feels small. But when that one slot is the difference between reacting all day and having 20 minutes of actual strategic thinking, it is not small. It is everything.
Tomorrow, I am going to take this concept into the workplace. Because if the outside world eats 2 or 3 of your slots before 9 AM, work is coming for the rest of them. And there are things you can do about that too.
FITFO moment of the week: Check your screen time report right now. What are your top 5 apps by usage? For each one, ask: is this earning a slot, or is it eating one? You do not have to delete anything today. Just look at the data. The awareness alone will start changing your behavior.