Pull EVERYTHING out of the cabinet. Wipe down the cabinet while it's empty.

Look through your pile and determine what pieces you never use. Don't put them back. Put them in a bag and donate them to Good Will, Salvation Army or sell them on eBay.

Look through your pile again and seperate the items into two more piles. One pile is the items you use all the time. One pile is the items you want to keep, but only use occasionally.

Go through each pile, examine each item and find its matching lid. If anything is damaged or missing a lid, write down the tiny numbers from the bottom of the Tupperware p ...