This puzzle series from Florida has been used to fulfill (as of now) 18 different puzzle caches around the world. Maybe one of them is near you, and you can log an actual smiley. Even if you can only do the solving, and not the finding, the CO has a way to "log" your accomplishment via a virtual travel bug. How cool is that? Work up to the final exam by starting here:
Puzzle Solving 101 - Lesson 1: Strategy
Tomorrow a puzzle cache in honor of Armed Forces Day.