re: Poker & Knowing when to fold em
Bet more than less than 1/2 the pot on the flop... 3/4 to a pot sized bet is good here.
He calls, what is his range of hands? A medium spade? A pair with a flush draw? A hand like 10-9, J9, Q9 with the unpaired card a spade?
The turn is another spade, so you can either slow down and check and give up on the hand or bet out strong representing a flush. Personally I would check and pray it gets checked down to showdown, but you are beat more often than not here.
Your weak flop bet gives good odds
for a hand like a 10-9 or J-9 with a spade to catch up...
I don't bet the river if you bet the turn and get called. You opponent most likely has a weak flush that isn't worth a raise from him...
More often than not you are just dumping more chips on the river...check it down.