A lot of the sites to print coupons and get freebies require you to give your email address. I strongly recommend signing up at somewhere like yahoo.com for an email that you use only for this purpose, because some sites generate a lot of spam and unwanted email. I get a lot of emails on my yahoo account, which I glance through, and if nothing interests me, I delete them all. My personal email is for only the email that I really want. Your comments on this blog go directly to my personal account, just in case you wondered!
When printing coupons, you can set your printer preferences to black and white in order to save on color ink, which is most expensive. I have never had trouble with my black and whites. To conserve paper, you can use any color paper you have on hand, and in fact, I have already used paper that was already printed on one side, and printed my coupons on the other. I had no problem with that, either. I wouldn't use anything with my personal information on, though. :) If your barcodes won't scan, it's probably because your printer is not properly aligned. I had trouble when I first started, then I aligned my printer, and have very little problem anymore.
I usually print 3 coupons on 1 piece of paper, even when I'm only printing one at a time. To do this, I print one coupon, turn the paper around, and print one coupon on the other side. This leaves a blank space in the middle. Cut off one coupon, and you can print the third one in the empty space.
Giant Eagle will double coupons with a face value of up to 99 cents. 25 cents becomes 50 cents, 50 cents becomes $1, 75 cents becomes $1.50, and 99 cents would be $1.98. You will notice that some coupons say DO NOT DOUBLE. As a general rule, Giant Eagle doubles all coupons under a dollar as long as the numbers under the barcode start with 5. If the barcode starts with 9, the coupon will probably not double.
If you ever have any questions, I will be happy to answer them to the best of my knowledge, so ask away!