How Frugal Are You? from Grad Money Matters. This is a great discussion of what frugality is.
The Most Cost Effective Ways to Stay in Shape from FreeMoneyFinance. Running is the exercise and I plan to get back to running regularly next month.
Throwing Away Money from Stingy Students. This one involves two topics I like dumpster diving and the value of spare change.
There are plenty of great posts besides these so be sure to visit the Festival of Frugality and see all the posts.