Old and Interesting is a website devoted to the history of everyday domestic items such as washing boards, irons, brooms and kitchen utensils. What does this have to do with genealogy? Two things: it can provide context on how your ancestors lived and it can be a useful resource when you are trying to date old images and photographs that might happen to contain household items.
The website is a wealth of information on everyday household items, how they were used, why they were used and what they looked like. As an added bonus, by looking at this website you may be able to finally figure out the purpose of that old family doohickey/heirloom.
Thanks again to Genealogy in Time for highlighting another useful resource.