The "Red Book" is one of the best.
I get a "brick", that is a box of paper rolled coins from the bank (I preferred the bags right off their counting machines because you didn't have to deal with ripping the paper from the rolls but most banks here won't do that anymore). Then I look at each coin and lay the best looking ones in rows of ten on the table.
The rows would start with years ending in "0".
I make piles of the best three or four good looking ones, and replacing and improving the stack as I go.
You will notice that some piles fill up fast and some may get very few, or none. That will show you what the key or semi-key coins are.
Good luck