Why not give out reusable magnetic memo cards? Jenni from Jenni's Papercraft Designs has some lovely designs to choose from for personal or business use. Imagine this one with your logo and business slogan on it? (The price in the image is the retail price)
"Digitally created, colourful graphics on white A4 sized card with matching paper ribbon trim. The board has magnets placed on the back and is laminated ready for use with whiteboard/dry erase markers. One dry erase marker is included. "
Why not visit the blog or shop to find out more?