I know it's tough to get yourself to workout when you're tired, dragging or generally not interested. There are a lot of barriers that can get in the way and a ton of excuses popping around your head. But try to remember how good you'll feel after a little bit of movement!
Get yourself on the floor for this quick warm-up circuit and I bet you'll feel up to getting in more work. Repeat this 3 times: 10 alternating arm leg extensions + 20 mountain climbers.