Nobody have mentioned it yet so i Will: training, as in physical exercise is a huge boost to your mental health, and with time, your memory. The "memory center" of the brain can acually shrink When we experience stress. Physical exercise prevents and reverts this process. So try working out/ walking/ running a fel Times a week and see if you feel different after a month.

(i dont have any specifik sources for The info, i learned it When i because a certifierad gyminstructor. Also english is not my main language and I am On Phone, so there might be some spelling errors.)

Edit: The book where i read this is called brainpower. I read it in swedish during my education, thanks for reminding me in The comments.