A: The answer may be no farther than your browser.
There are several web sites (and books) that provide examples of how to sign words associated with Christmas. Some offer drawings or pictures, while others provide video or animation. All of them describe how to make the signs.
Here are some Christmas words and sources of signs:
Chimney ASL Pro
Christmas ASL Browser ASL University Handspeak.com *
Elf ASL Pro
Ornament Picture Plus Dictionary 
Present ASL Pro ASL Browser Handspeak.com * Signing Online *
Reindeer ASL Pro
Santa Claus ASL Browser Handspeak.com *
Sleigh ASL Pro Handspeak.com *
Wreath ASL Browser
Stocking ASL Browser
Sign Language Site Descriptions
- ASL Browser - This site consists of samples from a CD-ROM, so new new ones will never be added. It does offer a very good selection of words though, organized alphabetically. The site shows Quicktime videos of an adult signing the words.
- ASL Pro - Video dictionary divided into a main dictionary, a religious dictionary, conversational phrases, and a baby sign language dictionary.
- ASL University - This site offers many words, organized by category. There are photo illustrations and animations.
- Handspeak.com - This online dictionary is regularly updated with new additions. There is a large selection of words organized alphabetically. The author has even included some of her own homemade signs, such as a homemade sign for the word "browser." The site is subscription-based.
- Signing Online - This is a subscription site that helps people learn sign language.
- Christmas Spirit in ASL - This article has resources on Christmas songs and stories in sign.
- Christmas Songs and Carols in Sign Language - An index of Christmas songs and carols and sign language translations, or ASL glosses.
- Songs and Pledges in Sign Language - Additional resources for the words to songs and pledges in sign language.
Christmas is also associated with food! Food signs are in the Food Signs reference guide.
* = Paid site
