Sardines, corn, any old rotten meat that smells real bad - I had my best luck with the sardines that you can buy in a can at a food store

Squirrels

Nuts!!! Squirrels love nuts. You cant make a trap for a squirrel (unless your a good welder! lol)but you can buy traps for them. I have a Havahart trap. I set it once or twice and all i caught was a bird. But they do work...