Right. And that's something you only figure out through long experience. Just today I missed an opportunity in a similar situation... playing JT of hearts, I flopped Ah Qh Td. GREAT flop... someone else led weakly, and two of us called. Turn was the Kc, giving me the nut straight plus my flush draw + royal draw. Same guy led out small, the second player raised. I flat-called as did the original bettor. Looking back, that was a missed opportunity; I should have raised (at least min-raised) right there to get more money in the pot. I knew the raiser had a jack and I was at worst going to chop the pot, so why not get him to put more money in and increase my profit on the hand if I hit my flush? River ended up being a blank and we chopped, so it didn't matter this time, but that's a mistake in thinking that I won't make next time it comes up. If I had hit my flush, he probably would have just called my first bet or even folded, and I wouldn't have made the maximum amount possible on the hand.