On the iPhone and iPod Touch when are in the iPod application, it shows a bunch of shortcut icons on the bottom of the screen. The last icon is for "More" where you can select from a bunch of other options. If you find yourself hitting "More" often, you can customize the icons that are shown on the bottom of the iPod screen so that the ones you want are always there and you can stop hitting "More".

To customize those icons, tap "More" and then tap the "Edit" button at the top of the screen. You'll be shown the complete list of options that are available. You can tap and drag any of the icons into the list of icons on the bottom of the screen. When you drag the icon down, it'll replace one of the existing icons and you can tell which one will be replaced because it will be glowing. You can also rearrange the icons.

Once you have the iPod icons the way you want them, tap "Done".