So when I first got my 13" MBP I tried lots of things to keep the battery health up. After following what I had read online/a few things here (mainly using it plugged in whenever possible, and not letting it get below 20% before charging) I was down to 87% health after only 2 months. I had read in one of the threads here that a LOT of people had success using their MBP from 100% to 5-10%, and then charging it solid to 100%. The only downside to this method is that it adds more cycles, but considering Apple rates the MBP at 1000 charge cycles I think we'll be fine. Anyways, so after just 3 days of this method and I'm back up to 92%. In other words, if you want to improve the health of your battery than just use it until it's about to die and then fully charge it. Dont charge in spurts, or when it gets to 50%, or anything like that - I tried it all, and I noticed the health slowly go down. Just thought I'd post and let you guys know!