If you are going to primarily be in the Dallas portion of DFW, I'd recommend Gloria's (like already mentioned) or Primo's Bar & Grille. Both are fun little happy-hour type places with great food and even better drinks.
If you are looking for shopping, you can't lose with the Galleria or Northpark. Northpark has more high-end retailers and more stores. That's my opinion anyway. Galleria is nice, but I just feel like a lot of the stores there are just 'fluff". Northpark is a little bit farther down I-75. There is also a "premium outlet" center in Allen, Tx which is just a short drive away.
If you are looking for bars that are fun but not too crowded, you can't go wrong with anything Uptown. There's also a wine place called Vino 100 that is really chill and a good place for a low-key or evening-starter. It's within walking distance to the Uptown lounges/bars.
Stay away from places like Purgatory. The radio spots make it sound like a cool place, but trust me when I say it's not.
Stay away from Rockfish. It's a seafood chain joint that is awful.
For more suggestions you might want to try checking out Yelp.com. People place reviews for just about every building in the metroplex and it helps you get a sense of what you will get when you visit those places.