Saturdays are my favorite days to go. Ours puts brand new Target items out every Saturday for a fraction of the cost of what you'd pay in the store. Cue heavenly music now.
My other favorite place to look at is their furniture section. My husband actually spotted these beauts!

We used a very light grit sanding blot just to take off the years of accumulated gunk. Next we went to Lowe's and picked out an off white paint and scored some grey sampling paint off the "oops" Isle. We grabbed a few foam brushes, and with some tape and a little patience they were finished in just a few days.
So my question is, where's your favorite place to score old furniture? Goodwill, flea markets, yard sales?