David Pogue from the New York Times recently got some tips on improving iPhone battery life from an Apple Store Genius.



From TUAW:

Three out of Pogue's four suggestions for improving battery life come straight from Apple's official battery life tips. First, he suggests turning off push email and setting email to fetch manually. Depending on how many email accounts you have, this could dramatically improve your battery life, but it also means you won't receive new messages until or unless you open the Mail app.

  Four tips for better iPhone battery life