You don't have to "do" anything with your slides. Just keep'um around, like photos, just to have. Use a viewfinder. Mine are in plastic sleeving, that is of course the best ones for viewing. Duplicates I keep stored.
Thuggins, you're sooooo right about d*&%$@l technology ruining a good slide. I get sad & cringe when I see my Kodachromes through a viewfinder in good light. So sharp & vivid. Then I pear out and see all these dinkheads with their digital cameras. Masses of mediocrity. (If you yourself also use digital cameras, well, then, I don't mean your a dinkhead)