I treated myself to an exercise DVD, with an Amazon gift card that I got at Christmas.
I've never been into exercise DVDs, but then again I wasn't into running 6 months ago. Anyway I'd heard good things about Jillian Michaels 30 Day Shred and thought it might be what I needed for non run days.
Well I've just done the first 20 min workout and I'm absolutely shattered, far hotter and sweatier than a 30+minute run. That was a level 1 workout, there are 3.