Game Theory + Bluffing + Hold'em

[Shandrax]

Hi there,

Q1: Let's say I got a flush draw. 9 outs on the flop give me a 37% chance to make the hand. With pot-odds of 2:1 I should bluff in 18,5% of the cases...right? (-> TOP p. 186)

Now how do I connect this percentage to bluff cards (the cards are out when I have to make the decision after all)? Since I can't roll a dice, how do I make my decision at the table? So far I used intuition, but I'd rather blame game theory than myself...

Q2: I more or less understand that game theory works well in limit games, because I know exactly what to expect and can base my decision on that, but what about NL? I could face a small bet on the flop and an all in on the turn. Can I even use game theory on bluffing in NL? I mean, can there be a "correct" bluff frequency in NL games?