Whether you prefer the standard jigsaw puzzle, or a brain-burning logic puzzle, Funagain can help. Most puzzles require logic or manipulation to solve, and are great solitaire activities while you're waiting for your gaming buddies to arrive.
There are many types of puzzles to choose from. Looking for logic puzzles? Look for ones made by ThinkFun. Want a traditional jigsaw puzzles? Check out the Ravensburger, or Buffalo Games line. For something a little out of the ordinary, check out three dimensional puzzles which make great display pieces in your home because of their intricate design and how interesting they look when completed.