#5
Quote by longestsoloever
Chords and scales and basic rhythms. Reading staff helps as well. Know every 7th chord in the book.


+1

well actually +9, +11, +13, ...
#7
learn every type of chord you can. and be able to play any chord as easy as anything and switch between them very fast. learn multiple variations of each chord as well. know what you're playing, not just how to play it.