East 6th is a vastly better experience than it's west-side counterpart. Good cocktail bars, breweries, dive bars, and restaurants. We love Whistlers for cocktails and Canje for some amazing food!
Assuming the weather is nice, Zilker Park is a a great spot to just hang out, have a picnic, and enjoy the view of the city.
Get the their specialty lattes or their rotating cold brew
Torchy's is a taco chain that started in Austin, so there are a few locations around town. They specialize in wacky, creative, over-flowing tacos. We love the fried avocado and baja shrimp tacos, and we always get the queso.