If you put a digital photo camera on a tripod, looking down onto your table, you can "scan" documents much quicker than with a scanner. You can practically "scan" as quick as you can flip the pages if you have some sort of remote control for the camera. Mark the rectangle that the camera can see on your desk and it's easier to position the document to be scanned.
This setup is also fine to quickly get hand-drawn illustrations into the computer, and is much faster than creating the same illustration with a computer program.
By the way, TIFF is an open format, without lossy compression, so in theory you should be able to find/write software that can read the files in 10-20 years from now.