How to sync music after purchase

Question

How do I sync music to my shufffle after purchasing music. My shuffle keeps saying to sync music ?????

Answer 1

This document describes the ways to put music on a shuffle (and also shows the four shuffle models)
http://support.apple.com/kb/ht1719
If the shuffle is the current 4th gen (or 3rd gen), here is one convenient way to do it.
If the iTunes sidebar (along left side of window) is not visible, from the menu bar, under View, select Show Sidebar.  When connected, the shuffle appears in the sidebar, under DEVICES.  Select the shuffle there.  To the right, the shuffle's Summary screen is shown.  Toward the top, where it says Summary, click Music to the right of Summary.  This Music screen is where you tell iTunes how to sync songs to the shuffle.
Before you set up that Music screen, create a new playlist in your iTunes library, and put all of the songs you want on the shuffle on that playlist.  (Or you can use an existing playlist.)  Back on the shuffle's Music screen in iTunes, check the checkbox for Sync Music.  Choose the option to sync Selected playlists, artists, albums, and genres.  Below that, find that playlist under Playlists and select (checkmark) it.  You can select other items on those lists if desired.
When you click Apply, the songs in your selection(s) sync to the shuffle.  Going forward, to update the shuffle's songs, just update that playlist in your iTunes library (add/remove songs).  The shuffle does not need to be connected.  The next time you connect the shuffle (or click Sync if already connected), iTunes automatically updates the shuffle with the same changes.