This is definitely one of the all time classic drinks. Nothing could be simpler. For those of you that don't know, the ScrewDriver is simply 1.5 oz of vodka over ice, and then filled with orange juice. Use fresh squeezed OJ if you can, it tastes that much better. There are a lot of variations on the screwdriver which I'll list below.
The Left Handed ScrewDriver (or Orange Blossom)-1.5 oz gin, fill with OJ.
The Sloe Screw-1.5 oz of sloe gin, fill with OJ.
The Comfortable Screw-1.5 oz Southern Comfort, fill with OJ.
And last but not least, the Fuzzy Navel-1.5 oz Peach Schnapps, fill with OJ.