We recently bought a cent-o-meter. It is a little thing that hooks onto your meter box and then you have a hand set that tells you how much electricity your house is using. We spent like a day going through the house seeing what used how much electricity and you'd be quite surprised.
The freezer used 11c an hour constantly. The kettle boils at 50c an hour, the hot plate cuts in an out a $1 an hour... Some things use masses just sitting on standby and don't even get me start on halogen lights, electrical boosted hot water systems and fish pumps.
Thanks helle - our house is full of halogen lights! I hate the things, they were here when we moved in.

Did your cent-o-meter tell you which appliance was using what or did you have to work it out yourself by process of elimination?