What is the best way to sync a second Ipod (7th generation nano) to itunes

Question

What is the easiest way to sync a second Ipod (7th gerneration nano)?  I want all my songs on both ipods.

Answer 1

iTunes treats each iPod separately, so you can set up each iPod's syncing as desired, without regard to the other one.  You can connect them both at the same time, and set them up differently or identically.
Here is a convenient way to set up automatic syncing, and in your case, keep both iPods in sync with each other.
I want all my songs on both ipods.
First, if your entire iTunes music library ("all of my songs") fits on the iPod, it will be easy.  Select the iPod in iTunes.  There is a row of "tabs" (starting with Summary).  Click on Music there.  Set it to Sync Music.  Below that, chose to sync Entire music library.  Apply the change.  Your entire music library syncs to your iPod.  Repeat for other iPod.  Any changes you make to your iTunes music library going forward syncs automatically to your iPods, when you connect them (or click the Sync button).
Otherwise, if your music library does not fit (or you want to be more selective), you need to set up the Music tab, but choose to sync Select playlists, artists, albums, and genres.  This is where you can keep it simple... 
Create a new regular playlist in iTunes, and name it something like "iPod Songs."  Add ALL of the songs you want on your iPod to that playlist.  Back on the Music tab, find and select ONLY that new playlist under Playlists.  Apply the change.  The songs on that playlist sync to your iPod.  Repeat for other iPod.  Going forward, when you want to update songs on your iPods, just update that playlist (add and remove songs).  Changes you make to that playlist sync automatically to your iPods, when you connect them (or click the Sync button).