[johnnyrocket]

You need to put someone on a hand range in bigger pots (you can do for every pot if you like), and as you get better it comes more natural. You can do this by stats or certain reads. Say you have JJ preflop and you raise, a player reraises, you reraise and he pushes all in. The pot now has $120 and it costs you $60 to call, so you should call if your less than a 2-1 dog, now you might say i think he has aces or kings, i need to fold. If you think he has QQ-AA 50% of the time, then you will win .5x.2=.1 of the time here, 20% since thats your odds against this range for 10%. And you speculate that 20% of the time he has a lower PP so your 80% to win, so you take .2x.8=.16, and 30% of the time you think its a coinflip, so .3x.5=.15.

You add these all up .1+.16+.15=.41 and you only need to be 33% to make this a correct call, thus you may be bad this time but in the long run if you think your range is right it is a call that has positive expectation.

HOPE THIS HELPS!