How to use a knife properly
How to sharpen a knife
Identify a screw type and select the appropriate screwdriver
Use a screwdriver properly
How to select a wrench for a given nut or bolt
Properly use those wrenches
How to patch sheetrock walls
How to recondition a hole that was stripped by a screw
Fasten wood things together with hammer and nail
Tie knots in rope, how to use that rope
Unclog a toilet
Change a door knob
How and when to use a bubble level
How to use a multimeter, and what to use them for
how to turn off the toilet water input...!!!