I used to call/push all in alot with my flush draws back when I first started poker;but nowadays I only do it if the pot is BIG and I have at least some sort of pair with decent kicker.My results are about even;sometimes I hit sometimes I miss.

Nowadays I usually just raise my flush draw on the flop.On the turn I check if last to act for the free card;if I'm first to act I lead out for a decent turn sized pot.On occasion if the player is someone who fold to an all in on the turn I will push to induce the fold(so far I've been called only once,and that was because the dude had flopped two pair and was goin to call me regardless).

Often I find people will fold then because they presume you are playing a set or two pair.