Well, among new songs I'm learning (or old songs I'm newly learning) are:
Raise All Your Voices -- CapriUni's new solstice carol
Mary Had A Baby
Joseph, Lieber
Christmas In Oregon  (funny song by Jinx Davis)
Candles -- Malvina Reynolds
Follow, Now, O Shepherds (Kingtson Trio)
The Man With The Bag
My Christmas Wish (sung by Anne Murray)
Mighty Lak' A Rose
and maybe Christmas In The Trenches  (don't have a good venue for singing it, though, except song circles)

Songs I've got to do a refresher course on for this season include:
The Rebel Jesus (Jackson Browne)
Jul, Jul!  (Swedish Christmas Carol)
Riu, Riu Chiu (medieval Spanish carol)  - never did get it memorized last year
Es Ist Ein' Ros' Entsprungen  (Gotta do a lot of rehearsal on playing it, classical style.  I know the words in German and English)
A La Nanita (Mexican? folk carol)
The Christmas Thong (a parody about an office party -- written for one of Áine's Song Challenge!s last year)
In The Bleak Midwinter (the Prairie Home Companion version)

Genie