Yesterday, I went to the co-working studio to work on my open source project, https://notabug.org/lwriemen/shlaer-mellor-metamodel , and just couldn't get started. (I'm at a point where I need to review and determine what else needs to be added.) I gave up and went to the day job.
Today, I almost slipped going to the co-working studio, but forced myself to and then forced myself to work. Surprisingly, it worked! Now I'm ready to finish adding the missing things and test it against an existing model (Microwave Oven).