Dafont is a website who has many kind of style of polices. Exemple in photoshop if you need a "chrismas style of letter" you go here and you download the style that you want and after you can use it in Photoshop/filtre and every kind of Microsoft Office. I found it somewhere in internet and i thought it could be usefull.
WebSite : Dafont.com
Tutorial :
1.Download the font you like.
2.Move 'Font'.ttf (File that you have downloaded) to C:\Windows\Fonts.
3.Wait till installation finishs. ^^
Tutorial Video :http://www.youtube.com/watch?v=AyTFbUWQJj8Ps: The video can be verry usefull
Tell me if there's somethings wrong with the tutorial, I try to make it the more clean possible.