David, what has amazed me, is that my buddy's wife isn't technical AT ALL! She doesn't know a thing about mass, momentum, drag, kinetic energy, regen concepts, etc. BUT, the car's feedback (mainly the tach, and the inst and avg FE displays) has trained her on what to do (or what works best). And she's become really good at it!
Many of the folks on this forum can give you great tips. I've only had my HAH a few months. But, there are a few things I've learned (by reading posts here or from my own driving): keep your rpm's low - try to stay under 2k if possible; limit your AC use - I think the AUTO mode works best but you might need to experiment; accelerate moderately and always be looking ahead (especially in city traffic) to try to limit how much/often you slow down; and when you have to slow down, try to maximize how much regen you can do - this goes back to watching ahead and trying to time traffic lights (both for the green AND red). Some hybrid drivers have also had decent FE improvement by increasing their tire pressure and also make sure you have LOW ROLLING RESISTANCE type tires - if you don't know hopefully your tire dealer or an internet search can clear that up.

I hope these tips help and I hope you DON'T need a new battery pack!!