Something that I’ve been figuring out over the last several years is how to save my receipts for things that I purchase. Do I save my images as .JPGs or .TIFFs or .PDFs?
Well, I have come to settle on using .PDFs as the best way for me. The format prints well when you need a duplicate of the original. Text words can be searched if the OCR recognizes and embeds the right information. And image-editors, like PhotoShop can handle the format if one needs to use all or part of it for another purpose.
One tip I offer is to make the filename descriptive if you can. So FILE.PDF is vague, while Sony_HDTV65.PDF will make easier identification of a scan.