Following my half-marathon adventure, I have NOT been motivated to get myself to the gym. It's a valuable lesson I've learned twice in the past year - if there is a hard-and-fast threat in my future, I'll be there, no problem. Without said motivation... not so much. I saw SUCH good results physically and emotionally the two times I stuck with it, I shouldn't have a problem getting myself in gear. But I do anyway!
Although, my snazzy new post-half shoes (Mizuno Wave Inspire 8 in White/Anthracite/Prism Violet) help a lot - they're wonderful!