I, for one, hope everything works out well in your move to Dallas. That's a big step, and Dallas has a lot to offer for young professionals. I lived there for a few months right out of college for work, and it was great. A couple of things I learned:
1. The women are smoking hot. And that are really responsive to guys who are not from Texas. Seriously, when you hit the clubs make sure you tell them you are from the East Coast.
2. When you buy your first cowboy hat, start with a 4 gallon hat. It takes awhile to earn the "street cred" in Texas to wear a 10 gallon, and if you start out with a 10 gallon you will stick out like a sore thumb as a wanna be. Ease in slowly.
3. Buy a Dallas Cowboys jersey, preferably with Landry on the back. This is an immediate "in" at the sports bars.
4. If you are driving on a two lane road and someone wants to pass you, pull over on the right. It's the Texas thing to do and starts to build that "street cred" I was talking about earlier in regards to getting into the 10 gallon eventually.
Anyway, good luck.