At 20NL I see alot of nits, and regular tags. Against those, especially nits, it does pays off to do some FPS because many times you can see right through them.
The problem, my problem anyway is adjusting when I'm facing those bad fishes, the itch to cbet, double barrel etc. my raised pot when it fits my supposed range gets the better of me and I end up spewing $$$.
Anyway, so my 5 rules, not necessarily the best skills required but I'll try to put different ones than said already :
1) BRM has been said by anyone but I'll put it anyway
2) When facing nits/tight regs, go ahead and bluff when you think they have less than TPGK. You'll get the pot.
3) When facing fish/calling stations, value bet and be done with it. You can cbet the flop or better just the turn, but then be done with it if they call. c/f. Shutdown. Don't be like me! lol
4) Beware when they're betting big, especially shoving. Some of the fishtards bluff all ins sometimes, but mostly will have great hands. Don't call with perhaps less than two pair even
5) Watch out for short stacks, alot of them will just wait till you open raise so they go all in, but only with the very premium of hands...so don't call just because they're short stacks