If it involves money, write out how much money you can potentially make by not making excuses, and do it.
I have been working on a project for a year and every time I lose motivation or find excuses NOT to work on it, I open up that spreadsheet to see how much my pricing is and how much money I can make.. and that motivates me to continue working on it and not make excuses.
I also was pushing 260 pounds... and I said to myself, "Wow, I'm over halfway to 300 pounds... I really don't want this to be my life." No more excuses. Ended up losing about 80 pounds. Read more about that here: https://mypost.io/post/no-bullshit-diet
Laziness. Procrastination. Even taking a day off. Totally fine. But for how long? Reward yourself with those things. Don't live on excuses. They don't pay the bills or get you anywhere in life.