signin Prepare to check e-mail Officially record an arrival Log on, and a theme hint Fill out a register Enter username and password Begin Facebooking, e.g Add your name to a register Add one's name to a guest book, e.g Register at a hotel A security guard might ask you to do this Request to a mystery guest Singing mostly out of tune? Try this register Make one's attendance official, in a way Start tweeting, e.g Record one's arrival