"Well, uh-" Harry thought about the spells he knew, and decided that sometimes a simple spell did the most work for him. "Get it where you want it, and I'll use a sticking charm."
He watched Ron maneuver the tree until it was standing perfectly straight,not quite wedged into the corner of the room. "Stand back, Leilalove, unless you want me to make you an ornament, too!" Leila ran away, laughing wildly, and Harry threw the strongest sticking charm he could conjure at the base of the tree. A great mound of sticky residue built up around the base, but Harry thought it could be covered with a skirt or something. "All right, Ron, let it go."