I have to agree with the other posters. I started smaller, running on the treadmill every 3rd day. Just 10-12 minutes. I started increasing it to every other day and 15-17 minutes. I then added free weights to 3 sets of squats and arm exercises. I knew I couldn't get right in to every day workouts. I also knew I wouldn't keep going if I knew I'd have to be on the treadmill for 25 minutes. I will also tell myself it's "ok" to take walking breaks or just go for a quick 10 minute run, but will keep going 95% of the time.
Like many others said, it's just part of your routine. If you'd have told me last year at this time, that I'd be getting up at 5-5:15 in the morning to work out, I'd have laughed in your face. My oldest is now in jr. high and gets on the bus at 6:50, so I get up and workout before he's usually up and ready to go. I've found that I'm much more of a morning person than I thought!
Right now, I run on the treadmill. I can't wait until it warms up, and I'll be doing more of a variety of workouts. If you haven't tried rollerblading, I HIGHLY recommend it! It's the best workout, and so much fun! In the winter, it's hard to really change things up, much. I don't have a gym anywhere close to me, so it's all what I can do at home.
For me, after a couple weeks of steady and consistent workouts, I started to want to get up and do it. I've been in a very regular routine, now, for almost 5 months. It's kind of like an addiction, now (alhtough a good one). Hubby said he needed to have the motor to the treadmill serviced and we will be without it for maybe a week. I'm freaking out. I can't go a week without running!!!
* You don't normally need to "service" a treadmill motor. Our's was under water when our basement flooded several years ago. Something happened to it, where if there's more than about 150 lbs on it, the belt won't move, so since hubby is 200lbs., it doesn't work for him. Just thought I'd put that out there, so that people weren't thinking, "Uh oh, we've never had our treadmill's motor serviced!!" LOL!!
Keep at it and it will get easier!! Good luck!