Let the hive mind of Engadget get that for you.
"I'm in the market for a new phone and money isn't a limitation. I'm also not partial to any particular US carrier, but here are some of the features I'd like to have: WiFi, GPS, good coverage in lots of places, push Gmail (a must!), physical keyboard (a must!), a touchscreen, decent battery life and a relatively slim body. And please, nothing that has a fruit logo on it. No offense to the fruit fans, though. Thanks!"
...energy saver application that is easy to access/edit/enable that will let you set-up preset energy saver modes (e.g. ‘bluetooth off, screen brightness half, WiFi off, 3G off’) where each variable can be set independently. Then you could easily enable your preset through this app when you need to save juice, rather than adjusting each one in their respective menus.