We need to get a few guitar riffs under our belt before we can work on any solos.Play these six guitar riffs by playing the score and then stop it and practice the riffs. Never try to learn a riff by playing along with the score. You want to hear it then play it by yourself so your ear can pick it up and then once you have it down and the speed you can play along with it. This is the first step in learn to play by ear, you play what you hear.