How do you take Christmas songs off your IPod and put them back on at Christmas time and only play those songs?

The easy way to do what you want to do is to make a file called Christmas songs and list the songs in that file. It will stay on your iPod, but you just don't listen to them. You could also go in iTunes and uncheck the songs in your library that are Christmas songs. Do a sync of your library to your IPod and the songs will stay in the library, but not be on the IPod. When you want them back go in to Itunes and check them, sync, and they will be back on your IPod. If you want only Christmas songs you would check all the songs that are not Christmas and sync. Either way the songs stay in your Itunes library, but are not on the IPod.