Delayed gratification.

I have found it useful, even healthy in stressfulness work situations, to allow myself the distraction - but only for a little while. This works fairly well for me.

Do one other thing. Play only one round of Minesweeper (yes, that's me). Read only one thing on Lemmy. Pick one of those. Then get back to work. For a while, anyway.

Eat the frog

Buy yourself a pack of cigarettes.

Smoke one, I promise it will be disgusting. Later that day, will yourself outside to smoke another. Repeat 2 or 3 times a day until the pack is gone. Live this way and be addicted to nicotine for a year. After a year, do it in reverse and quit.

Afterwards, you'll be able to will anything into reality.

I've always felt that my willpower is the only thing I have any strength in. The trouble is, that in order to exercise my will, I must concentrate on doing so. With ADHD focusing on anything can be hard as fuck if there's too many distractions. So I eliminate the distractions (or as many as I possibly can).

What is it you are distracting yourself from? The low motivation could also be that you are not really believing in a goal or you are not enjoying a task because you would rather do something else with your time. As others already said if you "suspect" you have ADHD you could also try therapy.