You know how it goes. You say to yourself, "Self, if you're ever going to get better at illustration, you'll have to try something harder." It's kind of the same idea as learning guitar by playing the toughest solos possible. So you try to draw something really difficult, like a tree. But you get into it and it turns out to be much tougher than you thought it would be. Then you turn and see your cup of tea sitting there, and it's so enticingly easy. And it turns out great and you're really proud of yourself. Then you remember that you totally backed down from getting better at something that was really tough, and it depresses you a little. And you resolve to try again later.