Several of you have asked about Mexican/Tex-Mex places in Dallas. While Ciudad is very good, it is way expensive. (I'm cheap) My all-time, hands-down,would-eat-there-every-night place is Ojeda's.
Standing on Maple Avenue among laundromats and used tire stores, the iron gates and security guard will make sure your Lexus or Mercedes in still intact after you are full from enchiladas. The salsa is very hot and the chips are the best around. Have a designated driver if you want to enjoy a margarita, too!When my Mom visits me, we make no stops from the airport to Ojeda's.

The best hamburger lunch deal is Gazeebo Burger on Royal at Preston. For $5.70, you can have a cheeseburger, fries and a soda. Fuddrucker's style, you can load up with lettuce, tomatoes, onions, pickles. Be sure to take someone with you to get a table while you order.

Lastly, the best pizza I have found is Brother's pizza on Montfort between Alpha and LBJ (by Target). It is NY style, with lots of cheese and a great thick crust. By no means a fancy place, but the pizza makes up for it. Lunchtime they serve by the slice. At my office, we order from there all the time.

Enjoy!