Only put back into the cupboard items you have used during the year, items that work, are clean (cleaned) and of good quality.
Put all questionable items in your “on the way out” box, your gift box or your charity store box depending on where you are in your mental process for each item. Be sure that this process includes everybody else in your house using the kitchen. (If you are the only one using the kitchen and you do not live alone, you may want to put aside some relationship discussion time in your house, but then hey, that is my opinion.)
Anyway... Trash all nicked porcelain and cracked cups.
Recycle if you have more than twenty plastic containers to store food in for each person in the house.
Get rid of anything you don’t understand how it works or don't know what it does (and neither does anybody else in your house.)
Cook with everything you own and do not want to give away. Use all those fancy items that nothing else can replace. You don't want to use it? Well - get rid of it then. (This is why we have sushi, fried Camembert, home made ice cream, cake, fondue (especially cheese but bouillon too) and other delights at least once a year. Usually in May.)
This task is also a good preparation to start the process of eating out the kitchen and the freezer. We do this in the weeks before we go on vacation, as we always turn of the fridge/freezer when we are gone.