Revving it up for 20 or 30 seconds is all it takes. Thinking, stewing, analyzing and putting it off will only result in misery. The pain of putting it off is immensely greater than the pain of doing it.
Think about the people who just did the Alcatraz swim with no wetsuit. You think they didn’t feel fear, agony, regret? Of course, but you know what they did anyway?
Jumped in the water and started swimming.
An hour later they’re on the beach smiling, endorphins rushing, fear missing from their mindset.
Now, go jump in the water.