It's crazy to think that almost 100% of obstacles are in our minds. We make up excuses about why we can't do this or that, and often we try to schedule everything we want to do into neat little calendars in our heads. I'll apply for this job in May 2020, and then this certification in January 2021, etc etc....
I find myself doing this sometimes and the solution is to steamroll your mind. Stop thinking and pick up whatever it is you wanted to start doing and just do it. Nike really got it right with that quote. Half the battle is just starting and ignoring your mind. Just showing up.
If you notice your mind is telling you to put something off, just steamroll it and keep moving forward. The smallest amount of momentum can be enough to get you crushing.