1. Never, ever allow the weather to tell you what kind of day to have.
2. Get dressed, whether you feel like it or not. This includes shoes.
3. Get some good food in you before you get some into your children.
4. Play some sort of music to get you going. It can be cheerful or dramatic or sad, or whatever works for you. At least this helps me. TV or books don't get me going; they get me staying in one place.
5. See how many steps you can use up moving from room to room (or up and down stairs, if you have some) in your house. Look. You've started exercising.
6. Start a load of laundry. Look. You've accomplished something.
7. Set an example for your kids. ("Oh, no, I knew you'd bring up that one!")
Sometimes you can't find motivation, so you just have to make some yourself. Hope your day gets better and better. :^)