Visit the Stockyards, Grapevine Mills Mall, Six Flags Over Texas, the Kimball Art Museum, catch the Dallas Ballet, and visit Deep Ellum. Also, you should definitely make time for the Fort Worth Water Gardens.
Quick Tips:
If you're planning on visiting both Dallas and Fort Worth, stay near DFW Airport. This gives you best access to both cities. Check for special events at Will Rogers Auditorium in Fort Worth, and avoid traveling between the two cities at 5:00 on weekdays.Best Way To Get Around:
Driving is your best bet; public transportation is improving, but not awesome. You'll want to park and walk in downtown Dallas or Deep Ellum, but most other areas require that you have transportation of some sort. Taxis will be hard to find outside of the airport and downtown area; you'll have to call for them.