Great advice from everyone.
And some mediocre things below:
Study. Practice. Analyse. Criticise yourself. Lose (not on purpose), then ask yourself why you lost and implement slowly how not to lose (or how to lose less) any more or as often. Or win and keep winning, but it is unlikely (not impossible). Let coolers be, but don't treat every lost pot as a cooler. Coolers happen when you judged an unlikely situation correctly, but the unlikely happens as it sometimes does. Be determined, never stop analysing situations and decisions and build your decisions slowly but surely. Try not to be overconfident or think that others always
bluff and they "could not have..." or "there's no way you could lose again". Micro players do bluff but it is unlikely. Micro players also believe a low pair is a winner. Micro players also chase gutshots and weird draws til the end. Micro players also call or even three bet trash (like 83, j2, 94 etc.) and they get lucky sometimes, leave it be and try not to add the trash to everyone's range. Micro players frequently play Ace rag off and I note them accordingly.
Hope it helps