I am a firm believer that one's handwriting tells a lot about a person. The font you choose for invitations, announcements, emails, etc... can really make a print. I've been looking at Christmas cards and saw so many cute fonts out there that I needed to add to my collection. Here are a few of my favorites right now.
School House Printed
Some Weatz Swashes
When it rains
I also make it a point that I won't pay for fonts, just one more thing I don't need to spend money on. Here are some great sites for free font downloads:
Fonts are easy to install on a MAC. Just click "download" and open the ".ttf " file. Then click "install font" and your all set. The font will be in all your applications. It is a bit more of a process for PC users, but is really simple. Click "download" and save the file to your desktop. Then open up "my computer" and find your "fonts" folder. Copy and paste the downloaded font from your desktop into your font folder and there you go, your font is downloaded and ready to use!