If you work in a desk job or lead an otherwise sedentary life, one way to get moving is to focus on taking more steps daily. You don't need to abandon your car and walk everywhere, but there are some easy ways to incorporate more walking into your life. Aim for 6,000 to 10,000 steps a day: park further away from your destination, get up a little earlier before work and walk for 20 minutes, and take a few minutes throughout the day to walk around your office.
If it's too cold to lace up your walking shoes in the Winter, check out this walking interval workout that can be done on the treadmill.