There are obvious ones like quality sleep, excercise, get some sunlight during the day and check your hormnes. I still feel a too drowsy during the day.
Do you have any personal experiences / anecdotes with what have helped you in the past?
Energy and caffeine regulation seems to make the difference for me. I like myself better when I have a substantial high-protein, high-fat, low-carb breakfast with a large strong cup of pourover or Aeropress coffee in the morning, a light lunch, and sometimes an espresso, small Arabic coffee or oolong tea mid-afternoon with almonds or cashews plus figs or dates or a small bite of something sugary. Otherwise I avoid sugar, which seems to throw everything off balance.
I think that if maintaining good sleep hygiene and diets have not helped for a long time, then one should probably start consulting a trained medical professional.
Exercise is the biggest one for me. It's weird because when I get out of the habit, I feel tired and lazy and don't want to exercise. If I can make myself go for a week or so, energy shoots up and you look forward to it. I'm not talking anything strenuous even, just a couple mile walk.
Also, eating less for lunch. When I eat too much I immediately feel sleepy for some reason. Anymore I just have coffee and an apple.