Scattered screws that eventually get lost. The Magnetic Project Mat put an end to this problem. Ice tray often doesn't do the job correctly when heavy tools stumble upon it. This creates more headache as you have to separate these mixed up screws. Very often you end up with a surplus of screws! All these problems are turned into solutions.
Screws are well organized and can be annotated using the Correctable pen. Coupling this pen with the mat is simply ingenious.
Use the pen!