Few things to keep in mind...
1. It takes a while to see results. This is something you do for life. Don't start working out 2 hours a day, get burnt out because you're not looking like a Greek God by next month, and give up. Your goal isn't to get fit the next few weeks, it's to turn your life around and to get into a balanced routine.
2. Find exercises you enjoy. I hate treadmills, I get bored after a few minutes and I can never stay motivated to use them. However, I enjoy biking, I can bike for hours in a nearby park, my legs will be burning, and I'll be having fun. Indoor exercise bikes I don't mind either. The same applies to weights, I use a few dumbbells and they're alright, but I really enjoy bodyweight exercises. I've been having a lot of fun with weighted parallel bar dips, and pullups lately. I see results with them, and look forward to it. My advice is to try out lots of difference exercises, and pick the ones that feel right for you, while still covering all the major muscle groups. This is the difference between going to the gym on a regular basis, and making excuses not to go. If you hate your workout routine, you're not going to stay motivated.
3. Work is always there. Until you die, there will always be code to refactor, bugs to fix, support questions to respond to, features to add, and higher revenue targets. It doesn't end, you'll never be done. Similar to exercise, it's a lifetime process, so you need to find balance. Set aside a day a week, like Sunday, where you don't work at all, you just clean your house, organize your desk, wash dishes, go shopping, return e-mails to friends and family, and get everything non-work related finished. Also, do the same daily, and set aside certain hours for yourself. For example, every evening, 5-8, you spent time exercising, then making a decent dinner. It doesn't matter what you do, just pick specific hours, and spend it improving yourself.