After a week I decided to get on the exercise bike that had become a clothes horse and cycle for ten minutes EVERY DAY. Even though I had to get up and prep for work and was tired, I made sure that I committed to those ten minutes.
I decided today to up it to 20 minutes. Small progress, so that I don't find it daunting to try to cycle for an hour like I used to. And I limit myself to the goal I set even if I feel I could go further, so I can positively reinforce the good habit and not demotivate myself by getting burnt out.