I had the problem as well with battery life, I wasn't as impressed with it, but the main things to turn off are the GPS,
Settings - Security & location - Enable GPS satellites
And the HSPA connection also eats battery life, when I am just using the phone for regular browsing or mail/msn'ing I keep it on Edge/GPRS.
To switch between the two, in Dialer hit *#*#4636#*#* (4636 spells INFO)
This will bring you into a "Testing" Menu
Under Phone Information scroll down to "Set Prefered network type" and select GSM only. This will slow down your network speed, but double/triple your battery life.
To turn HSPA back on, go into the same menu and select "WCDMA preferred"
I just wish there was a widget that could quick select between the two...
Again, its a trade off between network speed and battery life, as most of the time my phone is idle in my pocket, I want the battery life.
Hope this helps,
Please note, I don't know what the OTHER settings adjust yet, so I don't suggest touching them either unless YOU know what you are doing.