Don't forget the unbreakable criteria: <= 3:30; shorter is better No more than three verses made of at most two straight-rhyme couplets. Repeat chorus at lea

Don't forget the unbreakable criteria: <= 3:30; shorter is better No more than three verses made of at most two straight-rhyme couplets. Repeat chorus at least four times, more is better. Keep all instrumental interludes short and simplistic. Cliche pentatonic guitar solos only. Edit: almost forgot the most important one: be hot, use your body to sell the music.