I spend a lot of time looking at scores. Very rarely do I listen to music without the score because a) I like to be able to see visually how the music is structured, especially but not at all exclusively in orchestral music and especially in very texturally complicated orchestral music where looking at the score can make you hear more things than you would otherwise and b) it helps keep you focused on the music. I pretty much only listen to music that I know well without the score, and actually am somewhat reluctant to listen to music I don't know unless I have the score. I've gotten so addicted to scores that I bring them with me to concerts most of the time (on my tablet computer) - which is actually one of my favorite things to do. Apart from that I spend a lot of time studying scores (not enough, unfortunately) and reading over whatever on the piano - vocal music with piano accompaniment is great. Doing on-the-spot reductions of orchestral music is also great practice and viciously difficult.