I can't express enough the importance of pre-flop play. I first take some things into consideration: Trny or ring game, the buy-in limit, number of players, position, and stack size. If I'm utg thru 3rd seat w/an
avg stack then I'll throw out at least a bet of 3xBB. Mid pos will induce a slightly higher bet. In late pos to the button, (that is if no other bets have been placed) a bet 2.5-3xBB. If I have a nice stack in the top 10 then I might be shoving in some spots.
It depends on who or what's behind me, as well. An intimidating player/stack to my left may lead me to tank a bit just to get a better perspective. If a plyr calls I can usually put them on a small range of
hands and go from there. But I would never fold QQ pre-flop unless I'm short-stacked near the $-bubble.
If I'm in a ring game then it's usually tit for tat, approach the flop a little more cautiously say 2.25-3xBB. In most cases when a plyr calls your bet, trny or cash, they have a small ace or connectors like J9, KJ, 10-9, often suited. More ballsy plyrs will call w/small pairs or 98, 87, 76, you get the idea.
If I get raised then I'll probably just call, depending on my stack size, and let the flop fill in the gaps. If I'm short-stacked, (less than 15 BB's) then I'm shoving. GL