Memory starting to lapse? Take notes with a Livescribe Echo Smartpen (from $119.95; livescribe.com) and you’ll never leave an important meeting or doctor’s appointment scratching your head again. When used with the included notebook—which is coded with tiny dots that act as a GPS-system of sorts—the pen records everything you hear and write. Just tap a place in your notes and the pen will play back the audio from that moment in time. Upload the audio files (and visual, if you buy the Propack) to your computer, where you can search t and sort them, or keep them stored in the pen; it holds up to 800 hours of audio and is headphone compatible.