I'm in the same boat, Rei. Ever since I've been unemployed 8 months ago, I've gotten increasingly lazier. Working out doesn't happen as much anymore, and I have all these big cool ideas but all I do is think about them and plan to do them, while I sit on the computer or watch tv.
What has worked for me, a few times, were:
Like other people have said, making lists. I learned this from listening to the Tony Robbins' cd's, he's a great motivator! One day it was just to write down 2 goals, not to do the, just to write them down. The next day was to do them. The next day was to write 4 down. The next day was to do those 4. It really worked, I just got lazy and quit listening to the cd's
What has also worked for me, a few times, was hearing a song that made me want to dance, so I changed into my workout clothes just "in case" I felt like dancing, I'd be already ready. Well, I never even sat down cuz I went straight to my iPod and my trampoline and danced for 2 hours! I am not saying you need to dance,
but maybe some kind of music will motivate you to move somehow.
I think that when people have no structure in their daily lives, it will happen to almost anyone, they'll get increasingly more lazy. When you have all the time in the world to do something, why would you hurry and do it right away? That's how humans think. But if you have a limited time to do something, that gets you right on it right away. It takes a hell of a lot of something we must not have, in order to get something done when it is up to us when we do it.
Good luck, and I'll keep and eye on this thread for more suggestions, I need them too!