If my estimate is correct,

I should level up tomorrow. I've been gaining a lot of xp in literature and flying, but I haven't decided yet what on going to spend my next set of upgrades on. (I might use one to acquire the skill of not ending sentences with prepositions.) Ooo... gourmet cooking or 100% smooth landings would be cool upgrades too, but they cost a lot of xp, so I'm not sure if I'm ready for them yet. I wonder what kind of evil bosses I'll get to fight as a level 24 human???