Wear your house colors with a little more panache than the usual stripes.
Real books cause papercuts and have too many words. Start off a little easier.
We all know that Harry's Firebolt broom is top notch, maybe it can also make you a better writer. Heck, this is such a good looking replica I might just keep it in the case and not even write with it!
The boy who lived! On your shelf! With your preserves!
Books are for reading, not eating! Silly bakers, don't you know that serious Harry Potter fans won't be able to bring themselves to harming these precious books?