I'm a big fan of the little things here.

I fold 22-55 unless I'm getting 6:1 preflop. Set under set, flopped straights and flushes, that sort of thing can quickly devalue your set profits if Top Pair and 2pair aren't stacking off to you. Don't get me wrong; I'm rarely concerned about these things when I hold a set myself, but in the very long run, you lose a small chunk of your very meager profits there.

66-88 I'll play from position somewhat aggressively if I'm folded to, but weak on the flop. 99, TT, I'll play on the CO or button with many limpers or no limpers, but not with one or two without appropriate stacks. They have strong heads up value, and strong multiway value, but weaken considerably to 3 and 4 players. JJ I play aggressively with position, and will limp for sets in earlier positions.

I'll stress that playing these hands is costly out of position; some of the value from sets comes from people betting into you before you show strength. Then you have a choice to raise, or to smooth call, and great players like Brunson can create huge EV gaps when placed in these situations.