You want to upgrade those things you spend the most of your time and energy on. The top two are arguably your mattress and your shoes/insoles. The third is prob

You want to upgrade those things you spend the most of your time and energy on. The top two are arguably your mattress and your shoes/insoles. The third is probably your employer’s responsibility (which may well be you). After that? What do you do a lot of, that you want to do easier or better? Cooking? Get better knives, ingredients, utensils. Painting? Get lessons, buy better materials. Sports? Upgrade yr gear.