karaoke(i'm currently addicted to this)
walk around and get lost in an unfamiliar area
roll around on my futon
internet
TV(hell,japanese reality shows never ceases to bend my mind)
hanging around a high school when its time to go home and flirts around
playing basketball alone
buy a 1-day ticket and go ride a train to some unknown places for no reason
go to a cafe,buy a cup of coffee,and hang around for eternity
go to a bookstore,read mangas and mags,and not buying anything