Originally Posted by Pokerstudent
I think the foresight to determine what you want to do is important.
This is actually a key step in the development of good/experienced poker players. You actually want to have a loose general plan for how to play the hand through all streets while you're preflop, revise your plan on the flop, revise on the turn, etc. - newer players tend to figure out what they're going to do street by street.
For example, you're btn and utg opens for 3.5xbb, holding 98s. Is there any point in calling here? Depends on utg, right? You may decide that since utg never calls 3bets, and only 4bets 3% of the time, that a 3bet is good - no need for postflop play. You may decide he's too tricky to deal with postflop and simply fold. But let's say that utg is a terrible postflop player and can be knocked off hands easily postflop, and you decide there's more value in flatting on the btn. What's our plan when we flat? Two general scenarios spring to mind - first involves a favorable board and the second involves an unfavorable but dry board (float and see how aggressive utg is on the turn). Flop comes down one way or the other, and you'll revise that initial plan one way or the other, revise again on the turn, etc.
At any rate, you're right, this is a key idea.