^^ This. So much this. Everyone is quick to jump on those cool apps with the great looking widgets that always keep in touch with the mother ship. I want to know what's going on with CNN and I want it up to the minute. Well, that widget has to keep the power on in order to update so quickly.
As muzzy says, check your widgets. Update them if possible. If not, then start removing them one at a time (remove one, restart, wait). Once you get to the point where the launcher is not draining your battery any more, you will know what widget was responsible. Send the author feedback on that and hope they can fix it.