Reader Jeff found a clever way to quickly remember his favourite Gmail shortcut keys—by creating a folder of bookmarks named for the most useful hotkeys. Combined with the Lifehacker favourite Xmarks extension (previously known as Foxmarks), Jeff has his quick Gmail tips available on any computer with Firefox—a very clever solution for adding reference material that you use often. The more geeky readers will probably note that you can use thebuilt-in Gmail keyboard shortcut guide accessible through the ? key, but the idea of using a folder of bookmarks as a quick reminder system is a very interesting one—you could add a folder with a list of your long term goals. Which makes us wonder, what else could this technique be used for? Can you think of something clever to share with your fellow Lifehacker readers? Tell us in the comments.