Read this interesting piece about all of the things to be done to extend battery life. Unfortunately much of it relates to making the phone less useful.
And the other key action: remember to plug it in whenever you get a chance e.g. when in bed, when in the office, etc.
Given my dependence on mobile comms I am beginning to think that I may need to carry a boring E71 as backup.
- Mugen Batteries Review For The Samsung Galaxy S And HTC Desire Z (techie-buzz.com)