Lesson 2 - Head for churches and schools. They have parking (woo hoo!) and lots of sellers in one place.
Lesson 3 - Get there early. I joined the sale on Saturday, and the Thursday and Friday buyers had clearly grabbed a lot of the good stuff.
Lesson 4 - Bring a good co-pilot who can scout out the sales as you drive by to see whether it is worth stopping.
Lesson 5 - Watch out for cousin Eddie, I'm pretty sure I saw him out there!!