Clad coins get tumbled (if they're dirty), and most get deposited into the bank, others I spend. My bank has a free coin sorter so I just use that.
Old coins go into 2x2 holders and I put them into a file.
For now I'm holding onto jewellery. If I were to sell, I'd probably do so in private or over eBay, but never to a pawn store because they rip you off.