Robertson Square-Drive Screws
It may seem hard to get excited about a type of screw…but these things are great! They don’t strip, they stay firmly on the end of the driver and they drive easily. I began using them when I started doing some pocket-hole joints last year (Kreg sells them with their pocket-hole kits), but now I use them for everything. Essentially, instead of having the traditional "philips" head or regular "slot" head, they have a small square box opening in the top. They require the use of a screw-driver with a square end on it.
I don’t know why these things haven’t replaced the other more common types.