Sounds like you have a pretty busy life! I've found a lot of support and great suggestions here at 3FC -- so you've come to the right place!
RE: Eating
There are lots of different ways to do it, but what works for me is using fitday, tracking my calories and macronutrient percentages (fat, carbs & protein). I aim for between 1400 and 1700 calories and target <30% fat and about 20% protein (leaving 50% for carbs). I try to get in about 30g of fiber and 8+ glasses of water/day. Nothing fancy -- just eating less and trying to be accountable.
RE: Exercise
I'm a single mama to a 2-year-old and I work outside the home more than full time (not counting all the work I do at home!) Fitting in fitness was the hardest thing for me to do, and I'm just now (about 5 weeks into my weight loss) figuring it all out. I knew I needed to move more, but honestly, I'm trying to change long-held habits and that takes some TIME. First, I rented some exercise DVDs from Netflix to try before I buy. There are some that are family-oriented (like Leslie Sansone's Family Walk), and I just pop it in and have DS do the workout with me. Second, I try to get out for a walk with him (usually on his trike) in the evenings after work. Walking is amazingly effective -- and easy. I've seen lots of people here on 3FC who use walking as their only workout. Third, we joined the Y. While he's splashing about in the kiddie pool, I do kicks and squats. We run around the indoor track together, and there's free child care for when I want to do fitness machines (though I've been doing those on lunch hours and not using the child care).
Bottom line:
Whatever you do, you're more likely to stick to it if you commit to changing your habits for life. Start slow. Log what you are currently eating, and then set some smaller, immediate goals. Try to make each day better than the last in terms of healthy eating and exercise. Some examples of small goals are: 5% of your body weight --or-- exercise 20 minutes/day 3 days/week --or-- logging in to 3FC everyday (and reading the success stories -- incredibly motivating) --or-- no eating past a certain time at night (which was my major downfall, and a goal I'm still working on).
Wishing you all the best!