Charge it!

Consider this a friendly holiday reminder about your Apple (or other lithium-ion) batteries. If you’re giving an iPod or Apple notebook this holiday season you may want to consider including this link in the card: apple.com/batteries.
Following the iPod and notebook battery instructions linked off that page can help the new Apple product retain as much battery life as possible for as long as possible.

The site helpfully notes, for example:
For proper maintenance of a lithium-based battery, it’s important to keep the electrons in it moving occasionally. Apple does not recommend leaving your portable plugged in all the time. An ideal use would be a commuter who uses her MacBook Pro on the train, then plugs it in at the office to charge. This keeps the battery juices flowing. If on the other hand, you use a desktop computer at work, and save a notebook for infrequent travel, Apple recommends charging and discharging its battery at least once per month.

Enjoy!