My stash of home-made cards was getting pretty low, but I have been waiting to make more. The librarian at our local library told me that she clears out the circulating magazines at the end of the year and they are offered first come, first served to the general public. She even offered to reserve a few for me!
And they did not disappoint! I cut out any photo or illustration that appealed to me. I had purchased a package of 25 blank note cards with envelopes from the local craft store. They were on sale for $5 USD. Based on the size of the note cards, I created a cardboard template from a empty cereal box. I used the template to crop and frame the pictures I liked in a way that appealed to me.
Any two dimensional image can be used. For past cards I have used antique photos, old calendars, used greeting cards, magazines, interesting tags that came on purchased clothing, parts of a playbill, a politically incorrect children’s book that the library was giving away.
I have a file folder where I collect interesting images for this purpose. When I have enough, I buy the blank note cards and get busy!