I have a really bad habit - I'm a pack rat! I somehow seem to acquire lots of cute little things, and as a college student I really don't have anywhere to put them, so I try to send them off to good homes in other places. :)
I generally ship things by Parcel Post (unless requested otherwise) in 6x6x6 or 7x7x6 boxes mostly with items tucked in carefully amid packing peanuts or newspaper.