One trick that seems to have made it easier for me is changing the question from "Do/Should/Can I go to the gym today?" (which is just an opportunity to come up

One trick that seems to have made it easier for me is changing the question from "Do/Should/Can I go to the gym today?" (which is just an opportunity to come up with excuses) to "How do I go to the gym today?". It seems to tie into the decision fatigue theory. Instead trying to figure out if I can based on meetings/workload/other things in my schedule, I've already made my decision to go on certain days (in my case, every other day) and I just need to make sure my schedule works.