As many of us know, it takes a lot of time to label photos. We also know how frustrating it can be to have photos of family members; yet, have no idea who they are. Today I took a guess at a family photo. I based my names upon the ages. I fortunately still have someone alive who knew all these people so I can check my work, but many times we are not as lucky. And even this person who is alive, may not remember the names of his aunts and uncles. The old age thing can be a killer, no pun intended.
There are many different online services where we can upload our photos and then have them printed. I know that Shutterfly will print on the back of the photo any details you include. I personally think that if you are going to print photos, it is worth taking the time to write in the detail with a service like this. If you are going to keep them in an electronic format, give them a long name! There is nothing wrong with having a detailed name so you will always know who was in the photo. In organizing your photos on your computer, you can create folders for each event in each month in each year, so you have a detail from that side as well.
So go forth and label!