One thing not to do is dump them in those Coin Star machines at the grocery store where you then get paper money for your coins. I saw a show a while back on that company and one of the reasons they charge 9 cents on the dollar is because they wash, polish, clean, and sort all the coins with machines at the warehouse. They then send any coins not deemed in good enough shape back to the US Mint and get them exchanged. For that reason I feel they provide a service. To me it's too much trouble to tumble my clad to shine them up, and I hate rolling coins, so to me it's worth the 9 cents on the dollar not to have to do that and just dump them in the machine. I wash my coins in a bucket of warm soapy water to get the dirt/crud off, but because they polish the coins I don't need to shine them up so it's worth it to me.
But, one lesson I learned- any coins in real bad shape, which usually means zincs unless you dug another coin that has been hit by a lawnmower or something, will jam the machine up. Those machines do a great job of spitting out bad coins, as the public will dump everything from washers to anything else you can imagine in those machines, so they had to build them to handle most junk and spit it back out. Yet, despite all that, a few times I've had the machine jam due to zincs that were ate up bad. The clerk will come over and unjam it in seconds but it's still something I have no wish to risk doing, so these days soon as I dig a ate up zinc it goes right into my trash pouch and not my keepers pouch. Since I started doing that I've never had a problem with dumping my clad finds into the Coin Star machines after I give them a good soak in warm soapy water. Also, make sure they are dry good before sticking them in the machine.