Blogging your old items
If you had read articles on how eBay users search for old products from their garage and auction them off, why not look for those stuff and blog it?
Blogging may be a daily event of things happening around us or a thought we like to share but we can always come out with other ideas to blog about. If you can auction off one of your old picture in eBay, you can blog it and share your experience. Say if you visited a vacation spot 10 years ago you can always share your experience with the rest of users in the internet world. What you need to do is scan that vacation picture, post it on your blog and write what happen during the trip. Who knows you will get someone out there interested in your stuff.
