Eh, just be mindful of what you have running in the background. Facebook and Twitter only refresh every 4 hrs (everything else, including all Google apps are autosynced), I make sure to shut off that god-awful Facebook chat when I boot, but leave Google Talk running in the background at all times. Processor is set at 480/806 on-demand.
To be fair, normally I get 14-18 hours of life, but the car I just purchased doesn't have an auxiliary input, so I'm not streaming music on the drive to and from work right now. That alone can kill between 5-10% per hour, depending on the source. Poor network reception doesn't help either, I was in rural Ohio for Indy cars over the weekend, and was only getting 6 hours out of a charge, which was comparable to what my friend and my brother were getting with their phones (an iPhone 3GS and a Pre).