i would prefer menen to answer this but anyone is fine
camera, makanix and powerdag are three people that popped up in my head immedeately when i thought "better pixel artists than menen"
anyways, is there even a real trick to it? i started doing pixel art one day and now i can do it better than before.
a good way to learn how to do pixel art properly/get better at it, is to look at other people's pixel art.
try to redraw other people's stuff a bit in your own way to get the hang of certain stuff you're having a hard time with.