I think it's probably best to work out in the morning to get it out of the way. My ultimate top tip is to drag yourself, even if you have to roll yourself out of your bed and in to a sit-up - it's really not that bad once you start.
“I have two moods. One is Roy, rollicking Roy, the wild ride of a mood. And Pam, sediment Pam, who stands on the shore and sobs... Sometimes the tide is in, sometimes it's out.”