Hang out with people that are funnier than you... If you don't know any people that are funnier than you, then go to comedy clubs on amateur nights. If you go on a night when a professional comedian is performing, while he might be funny, chances are you won't be able to meet him or hang out with him afterwards. On amateur nights, you should be able to meet everyone afterwards. Find the funny amateurs, meet them, ask to hang out with them, and their humor will eventually rub off on you... You could try Improv classes too, as suggested by another poster.