For one, if you are missing a drill bit size for a pilot hole, there is a way around it. Also what to do when you run out of clamps, preventing glue from getting all over your work pieces.
There are also tricks to lamination, ways to use a hand drill and make a hole almost as straight as a drill press, and sharpening utility knifes (some call them box cutters) with a coffee cup.
Finally, the famous fixing a hole from a nail or screw from a picture being hung. Very effective, very useful tips.