Sending a postcard of a strip is a feature now offered on Dailyink.com. For $15 a year, you can send postcards, get your favorite comics and puzzles delivered to your inbox every morning and live a life of laughter-filled luxury. Check it out!  But for those brave souls who would like to send a particular cartoon to their friends the old fashioned way, we offer the following suggestions: 1. For a PC, right click and select Save image as;      For a Mac, click and hold and select Save image as. 2. Save the image on your desktop. Add ".gif" to the end of it. 3. Attach the image when sending an e-mail message. Good luck!