If your anything like my wife, then you paid careful attention to your wedding invitations. I remember going shopping with her to purchase the perfect invitations. She almost didn’t trust me to print out the invitations on my computer, and I could tell even then that she was still reluctant. Anyway, I remember sitting in her parent’s living room and watching her and her mother address each invitation. I think it took a couple nights. I tried secretly addressing one myself but my wife caught me and snatched the invitation out of my hands scolding me. I didn’t have the prettiest handwriting and these invitations had to be perfect.
Some people even address their invitations with a computer. This saves a lot of time and anyone can peel stickers and stick them to cards. Read this article that talks about mailing address tyranny and see some good pictures of DIY calligraphy.