I've seen the names of a bunch of very good places that I've been to. But I haven't seen the best place I've come across: Cooper's Pit BBQ in Llano, Texas. It's about an 2 hours west of Austin.
If you're in Austin and in the mood for a great day trip, start your morning with breakfast at the Bluebonnet in Marble Falls, mess around on the lake for a couple of hours or go for a nice walk at Enchanted Rock, then head to Llano for lunch or dinner.