Do it because you said so.
Don’t let yourself down. If you tell yourself you’re going to do something, do it. I run 4-5 days a week. I decide the night before if I’m going to run the next morning. Then in the morning I don’t have to decide. If I said I was going to run, I run. Some mornings that’s easy but today it wasn’t. I was up later than usual last night, had a busy day ahead of me today and there was new snow on the ground. So this morning I was tempted to hit the alarm and catch a little more shuteye. But, I had told myself last night I would run. If I had told a friend I’d meet them for a run I wouldn’t have stayed in bed and let them down, so why let myself down? So I chose to get up and run my four miles. I admit the first one was a little harder than usual but after that I was glad to be running. And the rest of the day went great. It might not have gone so well if I felt guilty all day about letting myself down.
It’s all about choices.