Not trying to do too much at once can sounds so simple on the surface, but actually you're paying less attention to the things that you are trying to change. And changing things and improving things requires a lot of attention, conscious attention, over a long period of time. The modern schooling system is to spit out people that would be happy sitting at a desk for 30 years, earning their pay check, doing a very specific task that doesn't change. School is not designed to light up your mind. It's designed to compress the breadth of human knowledge necessary to be a good eighteenth notlescnin century worker. That's what it was designed for.