Installing a kitchen means you can cook dozens of meals...if you have recipes and the right ingredients, that is. Putting together scrumptious dishes from collected recipes is not only fun, but eating said dishes will also restore your stamina. You can buy recipes from local restaurants.
The quality of the finished dish will naturally depend on the quality of the ingredients, but there are two other ways to change its quality: raising your Cooking Level by cooking lots of dishes, and adding toppings. You'll only be able to add toppings once you've reached a certain Cooking Level, so either way, try and make as many dishes as you can!
The closet allows you to change into any clothes you've tailored at the general store in Westown, the wholesale store in Tsuyukusa, and the jack of all trades shop in Lulukoko. You can coordinate or mix-and-match clothing, hats, and glasses. Put together the right ensemble and you'll even earn praise from certain townsfolk.