i think i'm just having a little mental block at the moment when it comes to playing against short stacks.

by short stack, I mean 25% of the max buyin or less
As I play at NL50, 0.25/0.50, i'm talking about players with $12.50 or less. I haven't kept records but i seem to be making foolhardy pushes and calls and just altogether playing too aggressively.

often i'm looking at a 2.5-3x buyin stack and when i get pushed around by a 0.2x buy in stack i just see fire.

how if at all should i play against these shorties? in particular there are three situations:

1. got a draw and semi bluff, or value betting against a draw board say with MP and they all-in

2. raise preflop, cont bet, get called or raised, and then i have to either fold it or put them all in.

3. preflop and they just all-in, me holding something marginal like 10.10, KQs, or AJ.

any advice much appreciated.
links to other posts also greatly appreciated.