I totally agree with the others. Just start making some changes. They don't have to be huge ones...you don't have to throw yourself with a big belly flop into the weight-loss pool, dip a few toes in first.
Change something you're eating, find a lower-calorie, still enjoyable alternative. I mean, an example for me is: THEN: 1-2 slices lo-fat swiss cheese on regular white bread; NOW: 1 slice turkey, lettuce, lo-cal mayo on lo-cal white bread. THEN: 1/3-to-1/2 can of Pringles; NOW-100 calorie snack pack. I'm still eating things I like (bread, salty snacks), just lower portions or calories. And here's a kicker: I find that by still allowing myself to eat things I like, I have more discipline than I thought I would. By allowing myself a little of something rather than totally eliminating it, it satisfies the craving and I don't have to go back to the feedbag (this week I have a box of Cheese Nips in the house that I literally count out 20 pieces for 100 calories and put the box away). Granted, it's not an approach that works for everybody but I have lost 19 pounds in 2 1/2 months basically just moderating myself foodwise and doing mild-moderate exercise. Aside from feeling good about losing weight, I feel good in the knowledge that I still have room to kick things up a notch when I'm able--whether I reach my goal in 4 months, 8 months, 12 months is not as important to me as the fact that I am striving to reach it. The tortoise did win over the burnt-out, cocky hare, after all.
As for exercise, got 10 or 15 minutes free? Do some indoor walking. Put on some good music and dance. Jog around your house. Do it several times a day. You don't have to plan it. Just get up and do it.
Don't overwhelm yourself into inaction thinking you have to attack in one fell swoop. Start with small, simple changes, they're easier to adapt to and help lead you to more changes.