by By Jonathan Vatner | March 31, 2009

postcardLenticular technology creates those pictures printed on striated plastic that change as you rotate them. It's now inexpensive to make, say, a save-the-date postcard or a luggage tag with a high-quality lenticular image -- and attendees will be more likely to hold on to them. A 4-by-6-inch postcard costs about 60 cents each for 1,000 pieces, and it doesn't cost any more than a regular postcard to mail. (800) 530-7544;