When you see a stray animal, what do you do?

Say you see a stray animal like a cat or dog hanging around your neighborhood. Do you feed it? Do you take a picture of it and share it on social media to try to find the owners? Do you ignore it? Try to trap it?
Bonus: do you care about each stray animal personally, or do you think there are too many to try and save them all?
I work at the humane society so I follow our procedure for stray animals but I'm curious as to what others do.