Everyone serious about running, or any other sport for that matter, has a couple of items they absolutely cannot do without! These are my top five: 1. My iPod. I’ve been running with my three year old iPod since I started running 2+ years ago, and lately it’s been getting wonky on my longer runs (running over an hour), so I recently purchased an iPod shuffle! It’s been great (besides the fact that it wasn’t compatible with my four year old Macbook, but that’s a complaint for another time). Fortunately I got it synced up to my parents’ laptop that has Windows 7 and it works perfectly. I wore it…