Since we're talking about people pictures for my next series of blogs, I want to take a small side trip to make a plug for restoring old photos for genealogical uses. Whenever I find old photographs of family members, I try to get those into my Lightroom database. (Of course, this also works in Aperture, Bridge, or any other database program you may use.) You don't want to lose these old photos of your heritage, so bring them into your files and back them up the same as your current photostream. You can find more about entering your ancestors' information in a blog I wrote back in 2010 (here).
I know I'm using a pretty broad definition of people photography by including these old folks, and you and I didn't take these photos. However, I feel strongly that you should save your old photos. Too many cherished memories just gather dust until they get tossed out in the next spring cleaning.
These old gems are a good place to begin learning how to restore photos. Black and white photos relieve you of the burden of color restoration at the same time you're trying to learn to repair tears and folds. You can remove stains and color shifts by removing all the colors. After you have made the restorations, you can add in a sepia or selenium tone to the repaired photo. Mark gave you a good demonstration of some restoration work back at the beginning of our blog (here).
Let me close out by entreating you to find and save these old photographs. The files won't take up too much space on your drives, and, once you've brought them back to life, everyone will want a copy. They are part of the world of people photography, and they are fun to fix up.