My family are preparing Nenga-jo (年賀状; a new year's card, which looks like post card).
We make it with Nenga-jo software, which has 2 big functions: address books management and card design. If you are a designer (or hobby), you can design with Illustrator or other paint software. In addition, you can print address side although MS Word if you're super hacker of Word :-)
We've bought Nenga-jo software, so we use and making Nenga-jo with it. However, the software is very unuseful... For instance, some window (dialog) can't close Command-W, which recommended key bind to close some window for Mac OS, address book window has not Save button, which exists in previous version, and so on.
We use the software with some endurer, it makes us comfortable; it manages two side printing in automatically. ...By the way, I spent 3 hours to print two side. It is too hard for me to use it.