these are some of the scenarios where I attempt a "steal", that work well for me (I say for ME because, I feel everything is relevant to your image at any given time)

-when someone who limps in front of me has shown a tendency to fold if they dont have a decent hand. The main reason i like this scenario is because not many ppl play over the top of a limper and a raiser when trying to steal the pot, so if someone calls/raises my raise then im pretty postive they have a strong hand and ill slow down. and the person who limped is more than likely to have a weak hand. (although, I personally love to limp in early with monsters hopin for someone to raise it up). this can be very risky, i only like it when 6-handed or shorter. i dont steal to much until tables are shorthanded and the blinds are big.

- i also like to put pressure on ppl who just went from a shortstack to a "comfortable" stack. not many ppl will play back unless they catch a hand.