How is everyone handling the battery with the Galaxy Nexus?

I've just made the switch from iPhone to the Verizon LTE Galaxy Nexus. So far I'm loving pretty much everything about this phone, with the one major exception of the battery life. I'm doing just about everything I can to manage it (3G mode, wifi/bluetooth/GPS turned off) but it still seems to chew through the battery in roughly half the time that my iPhone 4 does with roughly the same amount of usage.

I'd estimate that I'm probably getting between 12-15 hours of my average use on a full charge. I've tried to find an extended battery, but they seem to be sold out everywhere.

How is everyone else handling the battery? Is this just something I need to get used to if I'm going to stay with Android?