My battery life was dropping like crazy the other day so I checked to see what it was being used for. Turned out to be Groupon which I had set up to look for some deals. 1/3 of my battery usage was just that app.
Check your phone to see what is the highest usage. In most cases, it should be cell standby. If you are turning off the screen, wireless, bluetooth, and GPS, there isn't much else mandatory stuff to use battery.
I don't use the Elite a lot, but it lasts me 1.5 days usually. If I am running around town burning up the phone with Foursquare or Gas Buddy, that is another matter.