Bible pages: Although not so common today, people used to record all birth, death, and marriage information in their family Bibles. I copy these pages for later reference. You may also find verses marked by the owner of the Bible that may indicate where they were spiritually or if they were experiencing particular types of problems.
     Certificates of achievement: These aren't necessary to the family history because you can simply write down the information; however, these are one of the bits of flair to add.
     Contact information: Whether you write this information in the actual pages of your history or file them away for later reference, keep a list of everyone you've written to or who has contacted you who are researching your family. This way you can send them updates or write to them if you have more questions.
     Letters: This includes letters either written by the person or to that person. A lot of interesting information can be found in letters. I have a few letters I've collected and it's neat to see the style of writing (printing vs. cursive) and can also indicate the person's level of education by their spelling and use of grammar. One of the most important things in a letter is the signature. If you have this signature, you can then compare it with other documents and be able to determine if it was written by the same person.
     Pictures: Never pass up the opportunity to take pictures of your family. You don't have to put all of the pictures in your family history books. I try to place an updated picture in my pages at least every two years. This way future generations can watch the kids grow up and all of us get older. As I've said before, pictures give a face to the facts, even for the generations now passed away. Everyone can then actually see the person's face. I prefer trying to get close-up and a full body shot. Sometimes it seems impossible to get either, so I copy them as I get the opportunity.
     Wills: These are wonderful sources of family information. Very often these documents list all immediate family members and the property left to them. Not only can you learn the names but also what kinds of things the person possessed. Usually, a will begins with a short statement from the author and I've discovered a lot about the person's religious beliefs in these statements.
     Miscellaneous documents: Although I don't actually document all my sources, I do copy any and all paperwork I can find. Believe me, if someone's willing to part with the original, I take it without any hesitation. I have everything from newspaper clippings to driver's licenses, from uniform patches to ration books. It's not that I need any proof, it's just that I like looking at the old stuff. Collect whatever you can.

*** Note: Copyright laws also pertain to personal letters, diaries, and photographs as long as the person who owns them is still alive or they are protected under a publishing copyright - this includes personal or organizational websites. Don't just snag something and use it without getting the proper permission. ***