How do you scratch / pick slide properly on an electric guitar?

Question

how do you make it sound sweet and not like you have no idea what you are doing??? Thanks!

Answer 1

Torque the pick into a 1/3 bend with your tone at a proper Gonzo
Ted Nugent setting, begin the grind approximately mid-point between the two pick ups and Wango Tango it on down one time Baby!

Answer 2

Place the pick on the long side against the Low E string. make sure that you are just past the bridge pick-up.
Apply pressure and move the pick towards the neck, not too slowly, not too quickly.
Repeat until you get it right.

In other words... PRACTICE!!!!!!