I find the below tips work for me.

Eat the frog 🐸

Get the most challenging thing done first.

The 3-2-1 rule

Count 3-2-1 and then start!

The Do Something Principle

Do something, anything!

Purge your physical & digital surroundings

Possessions don’t mean rich. They weigh you down.

Stare at one thing for 60 seconds

Re-centre when your inner clarity is disturbed.

Confront your distractions before working

Move them out of sight.

Reference