DON'T: Tell someone you're not in their league
It never strikes me as a good idea to be too self-deprecating with someone you're dating, a la Jody saying he's not in Tara's league. While the goal seemingly is to have the other person affirm that this is in fact not the case, you also run the risk of them thinking, "Hey, you know what? This guy really isn't in my league, what was I thinking?" Dangerous territory.
DON'T: Make out with someone in front of the guy you actually want to get with
Drew, Drew, Drew… What exactly was he thinking when he made out with someone right in front of Cody? Maybe out of frustration about Cody moving to New York he went in for a kiss with this guy in the heat of the moment to make Cody jealous. Or perhaps it was just temporary insanity. Either way, bad move. I'm guessing Cody just moved up his flight to New York.