Right out of the box, your iPod's battery probably has enough juice to run for a little while without having to charge it up. Eventually, though, you'll need to go in for an electrical fill up. All you need to do is plug the iPod back into your computer with the USB cable (the iPod charges itself by drawing from your Mac or PC's power). Just make sure the computer is turned on and isn't asleep.
It takes only a few hours to fully charge your iPod's battery, and even less time to do what Apple calls a fast charge, which fills up 80 percent of the battery's capacity. That should be plenty of gas in your iPod's tank for a quick spin.
Here's how much time each type of iPod needs for both a fast- and a full-charge:
If you're traveling and don't want to drag your laptop with you just to charge your iPod, you can buy an AC adapter for it. Chapter 2 has more information on that.