Grasp your guitar pick firmly in your right hand.
Place the index finger of your left hand on the 12th fret of the E string, your middle finger on the 13th fret of the B string and your ring finger on the 12th fret of the G string.
Holding your wrist firm, slowly move the pick across the G string, followed by the B string and lastly the E string. Once you have plucked all three strings, move the pick in the opposite direction, picking the notes in reverse.
Continue this motion up and down the strings, striving for evenness and continuity between all notes.
Set your metronome at 60 beats per minute. As you sweep the pick up and down the strings, strike one note each time the metronome clicks.
Increase the speed of the metronome gradually, until you can fluidly play the pattern at 120 beats per minute.
Transfer this basic sweep-picking pattern to any major or minor chord.