If you have the budget, hire a personal trainer for 1-2 hours/week. It's not cheap, but having to make the appointment or lose the money you spent is a huge motivator. They'll probably work you harder than you would work alone as well as enforce good form. I got started lifting weights this way.
Then you'll be motivated to work out on your own to save money.
Then you'll be motivated to work out on your own to save money.