How to stop procrastinating on something I want to do?

The higher the emotional stakes, the more threatening failure feels. The unstarted project exists in your imagination in its perfect form starting replaces that ideal with something messy and real, and the brain resists this.

Fix:

1. Accept imperfection as the price of entry the version you create will never match the one in your head, and that is how creation works.
2. Make starting so small it cannot threaten the ideal 'write one bad sentence.
3. Schedule it like it matters, because 'someday' is not a day of the week.