Or get a dog. It's a trainer that will punish you by shitting on your carpet if you don't keep moving. You won't have time to be depressed.
(Just don't get a Husky. They're furry humans-- high-maintenance and not very affectionate, and will get depressed and act out when left alone all day.)
Pay a trainer for once/twice/thrice weekly sessions.
It is easier to skip a workout when no one else knows. I found it simply easier to just go rather than to make an excuse for the trainer.
It was worth the cost for me.