Apart from hanging a chalk board around your neck for those moment to moment memories I would suggest you look in your 'recent documents' from the START button menu, and the drop downs of word etc. If you find one you find them all Otherwise I normally find they have reverted to the default and are in the C: drive my docs folder. You can tell how often this happens to me !!! another way is to search in 'files' not for title but for content - use an odd phrase that you probably do remember - hope you find yourself soon, you can always ask nurse what your name is I find, she is normally helpful unless in a bad mood and then I wander around all day looking for new areas of France to conquer.
I have to search for lost files all the time! I'm almost an expert at it by now.
What china man said - do a search by a word or phrase that is in the file. If you use Windows, just open the Search function from the Start Menu; click Documents; click Use Advanced Search Options; then you can use a lot of different criteria for searching - including size of the file, time when it was created, modified, or accessed, and some word or phrase in the file. The key is to think of a good word or phrase that is not too common, but that would definitely be in the file.