Reset achievements along with nap time, so I can actually earn experience and level up. I mean come on. Sometimes it's like this game doesn't want you to progress.
Also, the amount of taiyaki and bells you actually receive within a given time is extremely disproportionate to how much is used to purchase things. For example, gaining one or two taiyaki from leveling up a cat (which in it of itself takes a very long time), and yet boosts cost five to 100 of them, and the cheapest gift basket is three hundred. Same for achievements: the amount of time it takes to get one craft or job to level ten is not worth a single exp. point, neither is leveling a cat, especially when it takes a while.
If you get to know your Kitty, you will see what makes her happy. Do what makes her happy and she will generate hearts automatically.