Amphipod Race-Lite Go Holder. One of the most practical running items I own. Not only is it great for attaching race bibs, but I also use it for short runs as a place to stash my keys, money, ID, and mini pepper spray (http://pinterest.com/pin/138415388517366969/).
LIVESTRONG Dri-FIT Visor (Yellow): I have a few different running hats and visors, but this is the one that I always seem to grab on my way out the door. It's lightweight, adjustable, and comfortable. It's got moisture wicking properties and has a really nice fit!
Jog.fm: Helps you find the perfect music for your run. It plays songs that match your pace. The app is available for iPhone iPad: http://jog.fm/app. The serious runner in me wishes they would've named this "Run.fm" instead. Lol. However, it looks like this app could be very useful for finding playlists suitable for various running paces.