How hard should the songs I work on be? One way to answer this is what are you trying to accomplish with this song, what is this song supposed to do for you? Look at this chart with 4 difficulty levels of music relative to your own abilities: Licks/study, Practice/growth, Performance, and Creative/Sight-reading. This is meant as more of a conversation/thought starter than an exact ratio or percentage. Also a person who just started running should take it easy, go slow, make sure you don't hurt yourself, while the seasoned athlete must push themselves. The same for musicians - beginners are nurturing their growth and abilities, good and great musicians are pushing the limits. In 2 days we'll talk more about each category.