Jordan Peterson has talked about getting something started in the context of "negotiating with yourself" to get past anticipatory anxiety. In short you have a conversation with yourself and agree on some minimal step forward, even if it is seemingly trivial.
Basically it goes something like "Do I agree to update my resume tomorrow?", "No.", "Am I willing to open up my past resume, and just add the companies, positions, and dates?", "Okay, I can do that".
So you realistically go back and forth with yourself until you find some step, even if it seems pathetic, that won't cause much anticipatory anxiety. Then sincerely feel good about getting that step done, because it is infinitely better than do nothing.
I have found that to be a useful mental tool/trick - will edit if I can find the reference because he conveys the concept much better.
Edit References:
- https://www.youtube.com/watch?v=CfQZcpaBqo4&t=5475s "CV Writing Example"
- https://www.youtube.com/watch?v=c-kWEDr6VS0&t=3462s "I don’t even have the conscientiousness to sit down and do Self Authoring. I bought it over a year ago and haven’t opened it. What the hell is wrong with me?" (A little more funny, similar thing)