4. Eat: Melted
@Meltednv, a Valley newcomer, brings its wildly delicious sandwich concept—the bread is a savory white-bread waffle and comes with a small cup of tomato soup for dipping—to Downtown Napa. In an area where quick, casual meals are few and far between, this spot is a serious gem. 

Also noted: 
@Gottsroadside, a Napa institution which now has an outpost at the Oxbow Public Market in addition to its original St.Helena location, is another excellent place for low-key dining. You'll find standard burger and milk shake fare on the menu.