Thanks for this guide. I followed everything in this guide and it made a huge difference. I went from around 4 hours to over 6 by following these steps. Especially killing start up apps helped a lot. Just one thing though, in spite of having turned off indexing on battery power, the machine is actually doing this as I write this, draining the battery. Why is this? Is there something more I need to do?
On a side note, it is annoying that it should be this hard getting a decent battery time. I have macbooks too, and they don't suffer from this.