One point I have found really helps for me, which is also mentioned in one of the comments, is always getting up at the same time. No excuses, and this counts f

One point I have found really helps for me, which is also mentioned in one of the comments, is always getting up at the same time. No excuses, and this counts for weekends too. You can go to bed when you are tired, but always get up at the same time. It's hard the first few days, but after that it gets easier and easier, and I feel much "fresher" in the mornings.