I absolutely adore these little save the date magnets that I came across on Project Wedding. They're incredibly easy (and inexpensive) to make, and with these pretty handmade hearts on their refrigerators, your guests will be sure to remember your wedding date. The messages can be easily modified to say anything you like and don't necessarily have to be dates, so even if your not planning a wedding, this can be an easy and fun DIY project. I think they'd make lovely little Valentines!
All you need you need is some felt, scissors, ribbon, stamps or fabric markers, small adhesive magnets (available at most craft stores), embroidery thread and a needle. Position your felt in two layers and cut out small hearts. Cut your ribbon into pieces and stamp or write your date or message on each piece. For each heart, stick a magnet on the bottom layer, place one of the ribbon pieces in between the layers with the date or message sticking out one edge, stitch around the edges, and you're done!
You can read the full step-by-step instructions here.