I can't itemize anymore, but what I've done in the past is when I get ready to donate the clothing/household items, I would lay them out on the bed or on the car trunk in groups of 5-6 items and take a photo and kept the photos with my tax files for that year.
When I dropped off my items at a thrift store receiving area, I would walk through the thrift shop retail store with my list to see what representative shirts, pants, belts, household goods, etc. were selling for.
