You'll work your soul to death if you're too busy. Being busy just isn't good for your soul. Take breaks. Go on vacation. Don't be so busy that you destroy yourself.
Take time out of your busy life and go bowling (ぼう) once in a while. In fact, you should probably go bowling once a week at least. Nothing brings energy back to your life like some relaxing bowling.
Currently there are no similar looking kanji which exist in the WaniKani learning system