Best Downtown Austin Eats
Thin crust pizza: Frank & Angie's http://www.hutsfrankandangies.com/
Breakfast taco: Taco Shack's fajita & egg (add avocado) on corn http://www.tacoshack.com/subframes/menus.html
Beef ribs: Ironworks http://www.ironworksbbq.com/restaurant-menu.asp
Deli sandwiches: Walton's Fancy & Staple http://www.waltonsfancyandstaple.com/home.aspx
Friday steak-for-lunch: Perry's http://www.perryssteakhouse.com/locations-menus/austin/friday-lunch-menu
TexMex: You'll love the atmosphere at Chuy's http://www.chuys.com/
Does that help?
If you search this board you will see this has been answered many times. Start by running a search, look at the threads bellow and then if you tell us what you are looking for: food, price, location, it will be easier to help.