That is the art on NL and PL poker.
Immediate pot odds are important in NL, as are
implied odds.
Also, knowing all of your outs is important.
For an exaple of implied odds, lets say you have
Your oppenent raises 4xBB and you are in the BB, and decide to call.
The flop comes
You flopped a double belly buster. If a 9 or a 5 falls, it will be very hard for your opponent to drop a made hand like an overpair.
You have 8 outs, and 47 unseen cards. If you check, and your oppnent bets the pot, you are getting 2:1 to call and your odds of hitting are 4.8:1 against.
So your odds are not good enough, however, if you and your opponent have another 80BB left apiece, you are getting about 12:1 in
implied odds, if you think you can bust him if you hit your hand.