How Can You Improve Your Cell Phone Reception?

live.pirllo.com - geeks.pirillo.com - I am getting used to having dropped calls on the iPhone 3G. This thing drops calls like clockwork. It doesn't seem like a tower problem. I can be sitting still, and lose a call. Even if the phone shows full signal, it still will drop. I'm hoping the upcoming firmware update will solve some of this. I've never had a mobile device with this many issues. What can you do to boost your reception?