Sometimes the best apps are the simplest ones. As we discussed earlier, Windows 8 is a significant departure from its predecessors, and longtime Windows users are bound to grow frustrated when trying to learn basic tasks, such as how to close Windows Store apps. (You don't have to close them, actually, but there's a way to do it.)
Windows 8 Cheat Keys is a great way to discover shortcut keys and other navigational tips for the new Start screen. Digitalmason.net's free app shows a few tips per day via toast notifications -- pop-up messages in the upper right corner of the screen -- and Live Tile updates. If you'd rather learn faster, simply launch the Cheat Keys app and scroll through the collection of tips.