First, I am NO expert. For coins that are "worth it", I send them to PCGS to get them slabbed, but that is only a very few coins. For those I like to display, mylar envelopes in some sort of sports card container. For some, I have Whitman folders (yes, I believe there are better brands out there) for my kid's collections. For silver "scrap", coin tubes. I hope someone else chimes in with other ideas...I'm listening also.
aj