Getting in shape

I keep planning on working out and getting in shape. However, our house isn't big enough to fit any fitness equipment and it's too cold during the winter to work out outside. I've debated joining a gym but I can't decide if I'm motivated enough to take my lazy butt somewhere to work out after working all day during the weekend. It's not such a big deal during the weekend since we're usually home all day. During the week, though, we generally don't get home until at least 6PM. Usually it's closer to 6:30PM. Then I still have to eat dinner, help my daughter with her homework and get her off to bed. By then it's 8:00PM and I don't feel like doing much of anything. Working out shouldn't be so much work ^_^