When does it sink in?

[Pokey]

Preflop: reraise to isolate against a (likely) weaker hand. There's no reason why you shouldn't be punishing limpers here.

Flop: you have trips with top kicker on a flush draw board. Calling is not an option. The strong flush draws need to pay you a bunch of money to keep going.

Turn: make it three. If CO is on a semi-bluff, you can push him off his hand right here. If CO is overzealously making a move with a weaker Q or overpairs, you cripple him and take even more money from him. Even if CO actually has the flush, you've got 10 outs to a boat.

River: with no read, CO's turn bet implies either a weak made flush or a very strong flush draw (i.e., A [img]/images/graemlins/club.gif[/img]). Given the river card AND the overcall, you can fold this with confidence. Sure, this time it was the wrong choice, but in general, I think the river fold is not a bad one. Of course, had the other streets played out differently, this might not have been an issue.