Matting your photos and cards. Some finished product for you to see

[steve B]

Acid free matting is a must, teh UV blocking glass is well worth getting if the framed stuff is expensive or likely to fade.

I use acid free clear photo corners to mount objects to the backing board, They're inexpensive, and readily available at most craft or scrapbooking stores. There's a tiny bit of worry about the corners doing slight damage to a card. There are ways around that, like sandwiching the card between two pieces of mylar(or whatever they're calling it these days) and sort of squeezing out the air from between the two pieces. Then placing the whole thing in the photo corners.

How much extra efort I'd take would depend on how nice the item is and how expensive it is. If it's something like 88 donruss, go ahead and use whatever tape is handy

Steve B