It's amazing how many times this rule isn't followed, or at least don't throw anything away or return the core until the job is done. More than once an alternator has come without a fan and pulley and a trip back to the parts store to get the old ones off the core has been made.
Here's a pic. Note this is a re-enactment. Sometimes you can get more torque using the vise grips on the screw, and that's all you need. However, snap the vise grips on, grab the screwdriver, and apply torque to them at the same time.
Just used another one today, one my father taught me. We were trying to dismantle some trim, and position light and some rusty body panels. The screws were rusty as will, and Phillips head. They wouldn't come out with a screwdriver, the panels weren't solid enough for an impact screwdriver...
Mine was installed in the spring of '95. I've only ever washed dirt out of it. I've been thinking of replacing it for a few years, one year I even got a quote.
The talk of screwdrivers and wood chisels as pry bars reminds me of another (mis)use of wood chisels. They are fantastic as gasket scrapers on cast iron. Not so good on aluminum, unless you're very careful.
I don't think I've ever used a wood chisel as a pry bar, I have plenty of screwdrivers!
My buddy, who runs his own shop, reminded me of one. If you wrench for a living, your pen is your most important tool. Whether to explain what needs to be done or what's been done and why, to either your service adviser or customer depending on your situation. (Of course in more digital...