I get bored working on the same project, too. No matter how disciplined I try to be, I always have several projects going at once.
Right now, I have handles to finish on a tote, a pair of orange socks, a cowl for a gift. Tuesday I finished a helmet liner for the troups that was part of a charity knitting project I started on Sunday. And didn't realize they needed it back by Tuesday. So I set everything else aside to get it done. Needless to say, my knitting table is a cluttered mess. A happy mess, but still a mess.