One of the best tips a newbie learns is that most Internet printable coupons can be printed twice per computer!
Finding it again: When you’ve printed a coupon once from sites like Coupons.com, it often moves to the last page. While you may have found the coupon originally on page 3, the second time around, it has likely changed to the last available position.
Going back: Many times you can simply press the back button to print a second coupon. If this doesn’t work, try clicking the original link again or opening it in a new tab.
Once: Some coupons only print one time per computer. These can be a site policy (e.g. Stonyfield.com) or because a coupon is popular or soon running out of prints (so manufacturers want it to be available to the most customers). Remember one is better than none, and photocopying coupons is always ILLEGAL.
PDFs: Portable Document Format enables the customer to print out multiple copies of a coupon. However, many store scanners don't like reading PDF barcodes (because they do not have unique number) and will make an angry beep. Read more about why this happens and what you can do here.