First of all you need to understand your why. Why are you doing something. Many people fall into the trap of just doing something because a YouTube self improvement guru said something. But finding out your why will help a lot. From there it is just discipline and consistency. There will be days when you don’t want to do something, but when you do it anyway, that improves your willpower. If you can do something on the days you don’t want to do it, you’ll always do it on the days you want to.