Recently I just completed leading a 16 week coaching group for mind body soul transformation.  I presented many techniques to the group including this one.  This was one of the  most popular and most effective for people in the group.  This is a super simple technique but highly effective in my experience. 

“You Are One Decision Away from a Completely Different Life”  Mel Robbins 

Mel Robbins describes the 5 Second Rule and how to use it  on her blog: "Start counting backward to yourself -- 5-4-3-2-1, then move .... When you start counting backward, you interrupt the habit of overthinking, you assert control, you focus yourself on taking new action, and you activate a different part of your brain." Robbins also states that counting backward will awaken the part of the brain that endorses the habit of procrastination and refocus thought patterns.

The good news? Science shows us exactly how to break any habit. You need to feel the fear and 5-4-3-2-1 do it anyway," Robbins said.  https://melrobbins.com

I highly encourage you to test this our on some things that you have been procrastinating on. It may be simple and effective tool for you. Try it on something small that you have been "working" on for a while .