Not sure of your itinerary but
BBQ
http://www.saltlickbbq.com/
Tex Mex
http://enchiladasymas.com/ or
http://www.juaninamillion.com/
Best burger in town
http://www.casinoelcamino.net/ its a bar on 6th street ( doesn't open until 4 pm) I would suggest the amarillo burger pictured below
I miss Austin
