Don't want to cough up $69.99 for a Lion USB stick? Make your own recovery drive instead. It won't contain a full Lion install, but it can save you if your hard drive goes south. Download a copy of the Lion Recovery Assistant and use it to build a recovery drive from your current Lion install. The assistant works with any thumb drive with at least 1GB of free space. Make sure to use a Sharpie to label the drive so it will be easily identifiable!