On each page, is a button you can click on to send the page to a friend. You can add a personalized message too! This way, you don't have to worry about them not wanting to click on the link for fear of spammers.
For some of them, you also have the option of printing out the pdf of the positive thought. You could save this to your computer and then send this directly to your friend. Or you could just print it out for yourself.