Ear training exercises include:

-transcribing music by ear

-singing scales

-singing intervals

-singing arpeggios

-improvising with your voice over chord progressions

-dissecting chords with your ears (what notes are in that chord?)


That should give you plenty to work with... Pick a different exercise to do each week and spend 5-10 minutes per day doing it.

Ear training is great! Not only can you pick apart and learn songs by ear better, but you also dramatically improve your creativity with music, and it refines your knowledge of music theory, which in turn helps you to make better musical choices when it comes to making variations on songs you learn.