Basic research rule that is most commonly overlooked – no matter how much material you check, keep a record of what you have checked.

Basic research rule that is almost as most commonly overlooked – cite your sources.  Make sure when you locate a document, reference, or listing that you take detailed information about not only what reference you were using, but where and when it was found.

Keep these rules in mind and your search may be a much more orderly and enjoyable experience :o)