I have the drain issue as well, pretty fast drain if you ask me. I'll usually let it drain till about 90% or less and then charge it. One weird thing is, charging from 90% to 100% takes quite long, like an hour or so...

i have an article which i wrote about batteries, specifically for the iPhone/iPod touch, but it applies to macs as well. I use this on my mac and so far after about 8 months of use, my MBP's battery capacity is still around 97%...

http://www.onemoretap.com/2009/06/04/tips-...e-battery-life/