There isn't anything I can say about Steven's that hasn't already been said: classical music played by the nicest owners in the entire world, a surprisingly wide supply of little odds and ends: sewing needles and threads, candles, a can opener. All the food and drink you'd expect at a corner store.
They have a wonderful supply of healthy plants and cut flowers in the warm months, and decent Christmas tress in the winter (and have twine inside to tie it to your car, as well.)