Make a post (public, friendslocked, filtered...whatever you're comfortable with) to your LJ. The post should contain your list of 10 holiday wishes. The wishes can be anything at all, from simple and fandom-related ("I'd love a Snape/Hermione icon that's just for me") to medium ("I wish for _____ on DVD") to really big ("All I want for Christmas is a new car/computer/house/TV.") The important thing is, make sure these wishes are things you really, truly want.
If you wish for real life things (not fics or icons), make sure you include some sort of contact info in your post, whether it's your address or just your email address where Santa (or one of his elves) could get in touch with you.
Also, make sure you post some version of these guidelines in your LJ so that the holiday joy will spread.
Surf around your friendslist (or friendsfriends, or just random journals) to see who has posted their list. And now here's the important part:
If you see a wish you can grant, and it's in your heart to do so, make someone's wish come true. Sometimes someone's trash is another's treasure, and if you have a leather jacket you don't want or a gift certificate you won't use--or even know where you could get someone's dream purebred Basset Hound for free--do it.
You needn't spend money on these wishes unless you want to. The point isn't to put people out, it's to provide everyone a chance to be someone else's holiday elf--to spread the joy. Gifts can be made anonymously or not--it's your call.
There are no rules with this project, no guarantees, and no strings attached. Just...wish, and it might come true. Give, and you might receive. And you'll have the joy of knowing you made someone's holiday special.
Note: If you want to send me something that requires more info from me, either comment or PM me and I'll let you know. If you want to keep it anonymous to me, contact azraelz_angel via PM and she'll let you know how to do it.
My Christmas Wish List
(1) Supernatural themed Gibbs/DiNozzo fic(s)
(2) Stargate/NCIS crossover(s) (no Tiva and little/none Ziva please)
(3) Sentinel/NCIS crossover(s)
(4) NCIS Seasons 6 & 7 on DVD
(5) Pre-Series fic(s) on how Tony joined NCIS
(6) Something for my parents new house
(7) Walmart gift card for gas/groceries
(8) Adobe Creative Suite 5 Web Premium for Mac (one can hope) ;-)
(9) A cool post card
(10) A donation to any charity of your choice
Below is a list of other LJ wish lists that I know of. Check them out, because you might be able to fulfill a wish for someone.
If you have a list posted let me know in a comment and I'll link to it.