So this is what I did:
For the index cards I already had I got a photo album that fit the 4x6 photos and stuffed them all in that.
And for the 8 1/2 x 11 that I have I separated into 3 binders. I have one of all main dishes, one for everything else, and one of recipes, separated by tabs into categories, that I have not made yet. This way I can keep organized and on top of the sheets of paper. I have found that this works best for me. Plus then I can put the binder in my trusty recipe stand, easel, holder thingy.