When I got engaged a little over two years ago, one of the first items I purchased during the early planning stages was a custom return address stamp. The reason: think of how many save the dates, engagement party invitations and thank you cards you will write in the matter of the year you are engaged. It is a very big amount, even if you only have 100 guests at your wedding! The great thing, is I used that stamp for everything up until we moved recently, and I ended up buying a new one with our new address.
If you have thought about purchasing one, today is the day to do it, since Wedding Paper Divas is offering one design at 50% off, and all the others at 25% off. This is a fast sale though, it only lasts until Friday Feb 8th at 9am PST.