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And in our times you don't really need a lot of money to build something your- self. A simple web server is $5/m. A code editor like Sublime Text is $60. To make iOS apps, XCode is free. A developer license with Apple is $100/year. It's not a whole lot compared to the money you can make back from it if you get people to use your app and pay for it.
Make_Bootstrappers_Handbook_-_-_Pieter_Levels
readwise.io
There are five major brain-wave types, each correlating to a different state of consciousness. “Delta,” the slowest brain wave (meaning the one with the longest pauses between bursts of electricity), is found between 1 Hz and 3.9 Hz. When someone is in a deep, dreamless sleep, they’re in delta. Next up, between 4 Hz and 7.9 Hz, is “theta,” which correlates to REM sleep, meditation, insight, and (as is often necessary for insight) the processing of novel incoming stimuli. Between 8 Hz and 13.9 Hz hovers “alpha,” the brain’s basic resting state. People in alpha are relaxed, calm, and lucid, but not really thinking. Beta sits between 14 Hz and 30 Hz, and signifies learning and concentration at the low end, fear and stress at the high. Above 30 Hz there’s a fast-moving wave known as “gamma,” which only shows up during “binding,” when different parts of the brain are combining disparate thoughts into a single idea.
The Rise of Superman
Steven Kotler
In this later stage of life, the [amount of time spent sleeping is associated with cognitive function](https://bigthink.com/health/sleep-cognitive-decline/), as measured by spatial navigation abilities, but this relationship is defined by a U-shaped curve. That is, older people who sleep for 7 hours per night perform best, while those who sleep for just 5 hours performed significantly worse, and those who sleep for 10 hours performed worse still.
Sleep Duration Clearly Divides Adult Lifespan Into 3 Phases
Big Think
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