Jibesh Saha's Key Ideas from Atomic Habits
by James Clear

If you can get 1 percent better each day for one year, you’ll end up thirty-seven times better by the time you’re done. Conversely, if you get 1 percent worse each day for one year, you’ll decline nearly down to zero.

1% worse every day for one year. 0.99365 = 00.03

1% better every day for one year. 1.01365 = 37.78

Motivation may give you the initial boost to do something, but as time passes, the energy of the motivation decreases and you tend to leave the work midway.

That's why you should focus more on creating good HABITS. Habits, once created sticks with you & becomes automatic with time. You need less & less energy to follow a habit as the time passes.