This is one specific problem I just can't figure out a good solution to. If I flop a four flush OOP a 1/2 pot bet seems good. You have fold equity and it also works as an effective blocking bet against all the but the most paranoid protectors. Most made hands will just call and see where things stand on the turn. The pot odds aren't quite right but the implied odds + fold equity + hand disguise + two streets to bet on make 1/2 pot on the flop fine.
But if you don't hit the turn, seeing the river for good odds has really become a conundrum for me. 1/2 pot is just too much to pay unless you are really deep stacked and your opponent is married to his hand. To break even paying 1/2 pot you must get your opponent to call 2/3 the pot on the river. With only one chance to bet and the river being a scare card, that's just not realistic.
If you check, your opponent will almost always bet atleast 1/2 the pot if he has any kind of hand at all. If he doesn't have a hand worth raise/protecting, you don't have any implied odds anyway. If you make a smaller bet that can give you good odds it screams draw and will almost always be reraised. I don't know how to handle this.
Btw, this is the standard 8 out OSSD and 9 out four flush, things would be different if you had good overcards or a pair+draw.
Ideas?