Also, Post-it Flags
Like most twenty-somethings, in the couple of years post-college I occasionally considered the idea of grad school. Then, one day, it occurred to me that the only part of school I really missed was the late-summer school supply buying spree.
So, each year since, at the end of August, I trek over to Staples and shop till I drop. It may not yield a degree, but a bag full of new highlighters and three-ring binders is close enough for me.