Davood Aghasi: Singer and songwriter Nematollah Aghasi son

Build your song around a riff. Whether you're a guitarist, a pianist, a bassist, or a non-instrumentalist, you can compose riffs that anchor an entire song. From Tom Morello's funk-metal guitar lines on Rage Against the Machine's "Bombtrack" to the Timbaland-produced synth lick on Jay-Z's "Dirt Off Your Shoulder," riffs can carry a track. As such, they're one of the best songwriting tools at your disposal.