This is so situational....how many BB to bet ?
Well, just as much needed to make it profitable in the long run.
From what position....yeah, best outof a position with just a few players left to act.
However, on a nitty table...every position.
When to start stealing....well pretty obv with low blinds it's not very profitable because players will play back more because it's not costing them much.
Besides from that, the reward is small if you succeed.
However, waiting till the bubble you're way to late.
As a rule of thumb I'd say it gets really interesting when antes come in play, which doesn't mean you must skip opportunities before.
You have to realise stealing blinds is about more than winning or losing some chips in a single hand.
It's an investment for future hands....you're creating an image which will win you more whenever you have a real good hand.
Besides from that....people might be getting annoyed of having their blinds under attack and at some point may decide to open up their defending range.
Which actually means they start playing hands outof position (unless you steal from the SB) and it will be hands they are not comfortable with.
Well, that's what we want, isn't it ?