Years Coins

What are some years or valuable coins to look out for?
I work in a retail store so deal with a lot of money. It’s usually pretty slow so I often sift through the change and take out old coins to keep for myself.
Just by dumb luck I came across a 1909 VDP penny. I know there’s probably tons of valuable coins and errors on certain coins and things but can you point out some years of coins that tend to be valuable or certain things to look for so when I’m sifting through the change I have a little better idea what to look for? I’ve found a couple of these rainbow coins and found the 1909 but are there any particular years to take or any particular years to be on the lookout for? What advice can you give me?
Here is a link to the values of U S coins. Good luck. People are every day breaking into someone’s house and stealing their coin collection and then spending the money so keep your eye pealed.
http://www.pcgs.com/prices/
2000 Year old Coin Discovered-During Jesus time on Earth