My advice is: to try and stay really true to the things that make YOU laugh, as opposed to trying to create a character that you think is funny. Some comedians get into bad habits when they are trying to create something that is not them, and they are trying to write a voice that isn't their true voice.
Dane CookText a guy you like right now, "I'm thinking about you." If he says, "mmm are you in bed?" Never speak to him again he's a lifelong moron.
Dane Cook