Can't remember all the Unity keyboard shortcuts? Then check out the AskUbuntu keyboard shortcuts thread - you'll find two wallpapers (one is also available in German) with most of the Unity mouse tricks / keyboard shortcuts: Unfortunately there's no SVG available so if the wallpaper resolution doesn't match your monitor, try tweaking it via the Appearance preferences (stretch/zoom, etc).
![Ubuntu Unity Keyboard Shortcuts Wallpapers](https://cdn-ak-scissors.b.st-hatena.com/image/square/2a7b478079644f366e44d3f00c9793c69b2975bf/height=288;version=1;width=512/https%3A%2F%2Flh3.googleusercontent.com%2F_1QSDkzYY2vc%2FTbVnyAUtG3I%2FAAAAAAAAEGo%2FxbI3PnYNEkw%2Fw1200-h630-p-k-no-nu%2Fcbjs0.resized.png)