if your going by the short stack strategy, then 8 8 + and facing a raise before you is all in pre,
Then if you raise yourself 3x and get re raised your supposed to let it go
those are basic guidelines, officially as a short stack your wanting to take the pot post flop "small ball"
or take it pre flop "resteals" for it to work you should be in position, and you should never be playing small PP oop,
most people dont like to sit with small ammounts, and i can understand why, but if your wanting to play small ball then being a short stacker has its benefits, usually players have to tighten up for the same reason you dont have the implied odds against them, they also dont have them against you, hence the reason the resteal is quite effective, problem with the micros are people dont notice the odds at all and will call for your entire stack meaning more races and a hell of a lot more varience