Arguably the best BBQ in Austin: The Salt Lick. There are outposts in Round Rock and at the airport, but there's nothing like the original location in Driftwood, Texas (just a 30 minute drive from downtown Austin).
Roadhouse Relics. Look for the artist Todd Sanders, who uses a number of weathering techniques to create faux vintage neon using durable modern materials. Be sure to take your picture by the Austin mural on the side of the building.