You are't gonna want stacks in most of the time against most players with TPTK.
Just fold top pair to a turn check raise...I used to leak off big time when I got check raised on the turn. It's a big hand 99% of the time.
Don't nit up pre-flop, but play what you can...don't cut 3betting range to JJ+.
Honestly without a read and/or history you shouldn't be calling too many 3bets anyway especially with like midpairs.
Just gotta post hands, read other people's posts, read the stickies, play and practice, etc. You'll learn and eventually start to win. If worst comes to worst and it comes down to it think about hiring a coach.
Edit: Really good collection:
http://www.pr0crast.com/2+2.NL.Anthology.v1.htm