Thanks William. Consistency for sure. Also i might argue these parallels apply too: 

1) Preparing (mentally and practically) in advance so you reduce the willpower and effort needed to actually start training
2) The ability to ignore discomfort (guitar fingers is nothing to the feeling of soreness after a decent hill run)
3) Not getting bogged down in theory when what's really needed is reps (something the GT tutors are very good at emphasising)
4) Learning not to judge your own performance by that of others (except when you do need to!!)   

Anyhoo, thanks again for the welcome