@Shalott -- One of the many reasons I love the Garmin Vivofit -- if I'm idle/sedentary for too long it beeps at me to get up off my ass. You can have it set automatic goals for you -- just pushes you a little more than where you ended up the previous day. I have no problems getting 7500-10000 steps in during the week, but on the weekends I fail.
I'm still battling knee issues and can't commit the money at the moment for a gym. I need a pool and a good price -- that's rare, lol. But I can get up and move around the house very easily. When it beeps and I don't have anything I NEED to do, I start decluttering, Two birds, one stone.