First of all, outs calculation should only be used when the situation you're in is likely to occur multiple times (e.g. in a cash game where the blinds stay the same). This is because when they do happen again and you make the right choices, you profit overall. But in a tournament, where the blinds change, its more about waiting for a better spot and survival. If the odds are right too call (e.g. 1000 into a 5000 pot on a flush draw after the flop), but your stack is 2500 and you're likely to have to stick it all in after the turn, its better to fold. This is because you can always wait for a better spot to stick your chips in. In a cash game, your stack doesn't matter because you can rebuy as many times as you want and if you get into the same situation again, you'll hit the flush about once in 3 times.