Five lines of the alto clef

From the bottom to the top: F A C E G Fat Alley Cat Eats Garbage

Five lines of the bass clef

From the bottom to the top: G B D F A Good Boys Do Fine Always Grizzly Bears Don't Fly Airplanes

Five lines of the treble clef

From bottom line to top: E G B D F Every Good Boy Does Fine. Every Good Boy Deserves Fudge (or Footie, Friendship, Fun, Fruit, etc.)

Four spaces of the bass clef

From the bottom to the top: A C E G All Cows Eat Grass All Cars Eat Gas

Four spaces of the treble clef

The four spaces of the treble clef spell out (from the bottom to the top) FACE

Guitar string names

Guitar string names in standard tuning: E A D G B E Every Average Dude Gets Better Eventually Eggs Are Deliciously Good Breakfast Energy

Order of flats in key signature

The order of flats is B, E, A, D, G, C, and F (reverse order of sharps) Battle Ends And Down Goes Charles' Father. Before Eating A Doughnut Get Coffee First.

Order of sharps in key signature

The order of sharps in key signature notation is F, C, G, D, A, E, B Father Charles Goes Down And Ends Battle. Fat Cats Go Down Alleys Eating Birds.

Ukulele

Ukulele string names: G C E A Good Cooks Eat A-lot