short stacks at the table

[nhl94god]

What strategy do you guys use with short stacks?

When they push all in and are 20bb deep....you have AQ, AJ...any pp.

When they are in the blinds or to your right and you are in late pos. with a SC, or low PP and usually its a easy raise but in the blinds there are two short stacks. Just fold and play tight until they pick up some chips, or leave the table? Cont. to raise as usual and fold when they shove with sub par hands?

Or any other situations with shortys i would just like to find a optimal way of playing them.