I lost my laptop charger in the library. I asked the librarian, but they didn't have it. They did, however, have one that looked just like mine but had the owner's name written on it. That's when I realized that I'm stupid.
Using a silver sharpie, I have labeled my laptop and my new charger with my name and phone number. I also put "calling cards" in my wallet and backpack. So now if a good person finds any of these they can be returned to me.
Although the fact that my laptop is held together by gaff tape does help distinguish it.