I use a system to avoid Patch's mishap...It might me less safe than shutting off the power, but it seems to work...My foot switch is on the floor next to the saw...I sit on a counter height stool that has cross bars near the bottom...Every time that I take my foot off of the switch, I move it away from switch by hooking it into the stool bar...Whatever works...The important point is to figure out a system, and then develop a habit, so that the safety practices just come naturally...If securing power works best for you, that's great, but DO IT EVERY SINGLE TIME...We are creatures of habit.
In designing my setup, I'd read about people that used their knee to operate the switch, but I saw too many potential problems with inadvertent activation of the switch...The knee setup would prohibit me from standing off to the side while cutting a larger workpiece...The knee thing would also require me to apply constant pressure against the side of the stand...I think that would feel too awkward and not allow me to remain comfortable throughout the cutting process.