Practice. I used to sit on the edge of my bed with a six-pack of Schlitz Malt talls. My brother would go out at 7pm to party and get laid, and when he'd come back at 3am, I would still be sitting in the same place, playing guitar. I did that for years — I still do that.

Eddie Van Halen in April 1996, in an interview with Guitar World, when asked about how he went from playing his first open A chord to playing "Eruption"