Imperial_Samura
Anticrust Smurf
Meh, I still think him and Hermione should be together.
And he should empty his Gringotts account and buy a flying motorbike like Sirius's.
And maybe buy a football... I mean a Quiditch team. A good one.
And most important of all - a huge party, with every single character ever mentioned in the series invited (even the dead one's, and even Umbridge, who will double as the pinata and then the donkey in Pin the tale on the donkey) at his Aunt and Uncle's house which would end up getting totally trashed, which would teach 'em for being such horrible guardians for so long.
But if I were to be serious I have no idea - what does any wizard do when they come of age?