I may not have finished all my New Year's Resolutions for 2010 but at least I finished a big one, a Marathon. I can't say it's for everyone but with enough determination and time almost anyone can do it, just ask the grandma that passed me or the man with a sign on his back that alerted me "80 year-old Marathoner."
I'm not sure when I'll be doing another, although I do see a few half-marathons/10-milers in my future. The alone time was introspective on the the long weekend runs—over 3 hours of running at times—but I'd definitely need a partner to motivate and join me in the future.
The pyschological reward of completing a challenge that, at the begining, seemed impossible made the journey all the worthwile. I guess that's why I'm on the verge of tears when I watch The Biggest Loser, nothing can compare to seeing the results of a commitment to fitness. What really pulls on the heart is that the individuals are changing emotionally. You can almost see the pity in their eyes change to zeal/passion after every hurdle, physical or mental. And just like running a marathon after a while it's all mental and the conflict becomes internal.
Let's just hope your lucky enough to have friends and family surrounding you with energy when you have none. That's how I did it.