For people who can't get motivated about treadmills or lifting weights and who have the space, a full length (floor to ceiling) punch bag comes highly recommend

For people who can't get motivated about treadmills or lifting weights and who have the space, a full length (floor to ceiling) punch bag comes highly recommended. I lost 60lbs in 6 months by channelling my aggression and frustration into that bag for 15 minutes at the start of each day. Take a few Muay Thai classes at your local gym so that you know how to punch and kick, then go to town on that bag as often as you can. After the first 3 weeks you won't be able to go a day without using the bag, it's addictive and probably one of the most effective forms of exercise after running.