Add to this list: Food, when it was eaten inrelation to tiredness, light/medium or hard exercise(what type of exercise) I certainly know my focus and "sharpne

Add to this list: Food, when it was eaten inrelation to tiredness, light/medium or hard exercise(what type of exercise) I certainly know my focus and "sharpness" does drop, yet it never drops at the same time(at least not obviously ie i have not measured it)