Mostly the Internet... But for prints, for my classy, rich, lakeshore-condo friends, those wide, thick-beveled, white museum board mats seem to work well. For color or B&W. I usually (in photoshop) run a black line around the actual photo. Then sign with Sharpie permanent marker on the print paper. Whole thing fits with a slight border inside the hole in the mat. Back-board should also be archieval. Print held only at upper two corners by archieval cloth library tape. Behind glass or plastic; don't like the non-glare textured stuff. Mat is wide enough that they can pick frame without too much distraction to match their furniture... Jordy is right aboyt black being classy, but brushed bronse or pewter also looks nice. Have tried colored mats, but have a worse time with that than with picking socks. For "general use passing around" Epson ink-jet prints, I've tried sandwitching between two pieces of plexiglass, edges taped with attractive duct-tape. Keeps fingerprints off the paper, and should help keeping out contaminants. But jury still out on long term permanence.