Make an On-The-Go Playlist on an iPod Nano or Classic
Sometimes you're out with your iPod, and you get the urge to hear a bunch of songs on different albums one after the other. Good news: You can create a playlist right on your iPod, and have it sync back into iTunes the next time you connect:
❶ Scroll through your iPod until you get to the title of the first song you want to add to the playlist.
❷ Hold down the iPod's center button for a few seconds until a new set of menus appear. Choose "Add to On-the-Go".

❸ Scroll to the next song and repeat the process.
❹ When you're done adding songs, press the iPod's menu button until you get to the Music menu; go to Playlists→On-The-Go. Under "On-The-Go", you see the number of songs you just compiled. Press the Select button to see the song titles.
➀ If you like what you see, scroll up to "Save Playlist" and click the center button. (If you don't like what you see, choose "Clear Playlist" to dump the songs and start over.)

Your freshly inspired playlist now appears in your Playlists menu as On-The-Go 1. The next one you make and save will be On-The-Go 2, and so on. When you reconnect the iPod to iTunes, you can click the names and change them to something peppier—or more descriptive.