First of all, I understand that when people have photos taken they often want to have access to the digital images for propagation and sharing over the internet. In a intellectual property situation this sharing creates even more copyright violations. In order to solve this problem I offer the following customer agreement. Please also notice that neither the customer nor any of their friends or relatives have the right (by default) to substantially alter the photograph. Still, I think this kind of agreement will free you to be able to post images to your blog that Grandmas and Grandpas, and other friends and relatives can view and save and even make their own prints of, like they want to, and as they should be allowed to.
You may use the images for personal albums (digital or printed), for personal web sites, for personal prints, greeting cards, t-shirts, posters, etc. Friends and relatives are welcome to save copies from your web site, obtain copies of up to half of the images on the disk, and make unlimited personal prints themselves.
You may not use images to advertise your business, sell the image, or prints of the image, you may not make complete copies of the disk for relatives or friends—they need to buy one from me (at the $10 plus shipping), you may not substantially edit or change images without written permission.