I think the standard play for these types of draws is to check raise and try to "buy" a free card.

I don't play NL cash games so i can't speak about that. But in limit i like to make the pot as big as possible for these (although it may not be the text book thing to do?). If it's a sng it would depend on the situation and type of player i was against and what other cards hit the flop , but i would also play these as strongly as possible, especially if i also hit a pair or have overcards too. I always like to put them under pressure, and even if i'm behind i have lots of outs to hit.

HU. Yes it's all about bluffing. I think everyone has their own individual styles. But personally i will raise as much as possible with absolutely anything and occasionally call if i have a big hand and want to trap.

HU you have to be willing to take the gamble, get your money in first.