I save my Anthropologie, Free People and various other catalogs because I find the photos beautiful and inspiring. Instead of having ripped pages filling binders, I get the same effect from cutting and folding them into envelopes. I use a plastic envelope template I purchased at Michael's years ago, but you can use any envelope you have around. Just trace, cut, fold and glue up the sides.
I use masking tape as a label to write the recipient's address on. I also tape the flap shut with masking tape and write on my return address.
Everyone loves receiving a little piece of artwork in the mail!