It would have been good for me to do the race anyway! I am hoping to get the exercise thing underway again now that the holidays are over. No weight-loss has been accomplished beyond a couple of pounds.
I find exercise for the sake of exercise to be really hard, especially when you are below the "athlete's wall" (that point where exercise stops being difficult, and instead becomes an addiction, where you feel the
need to get out and burn energy every day). I saw you mentioned that you're joining the 100 push up challenge. Good luck with that <please read that as enthusiastic support, not sarcasm>. I failed my 100 push up challenge.
The trick for me, is to do something hard but enjoyable, with a solid viewable progress until I overcome my personal wall. Running was never enjoyable for me, nor are push-ups, weights, or any other 'exercise'. It has to be fun, a sport. Personally, I'm a mountain biking addict, and a lover of rock climbing. Those are how I get back into shape every time I fall out of it.
If you have an indoor climbing gym near you, I highly suggest grabbing a friend and getting out there once a week for a month (it's indoors, so you can't slack off due to weather!). It is a great social activity (you spend half your time standing around talking, holding the rope for your partner who is climbing). First time out, it is hard (if it isn't, you just aren't pushing yourself anywhere near hard enough). But it gets easier, and very quickly the routes that looked insane become challenges to try, which eventually become your warm up routes.
Obviously, I'm biased towards climbing, but it really doesn't matter whether you climb or do some other fun hard activity. But get out there with a friend (or your husband - climbing is wonderful for staring at your hubby's tush), commit to doing it once a week for a month.
I noticed you mentioned Yoga earlier. But I missed if you updated us on your progress with it. While I love yoga, I don't find it a great way to get back into shape, but rather something that keeps you in shape. Until I'm something resemblign fit, yoga is just plain difficult for me, and I don't get the sense of satisfaction that I do from completing a climbing route or riding a new bike trail.