Show picking direction (lead guitar)
It would be helpful if there was a small arrow next to the notes that show if the string should be picked with an upward or downward stroke.
That way, the player can see whether he should use economy picking, alternate picking or some other combination in more complex songs.
It would be a great tool since inexperienced players wouldn't have to guess how to play a certain part.
Just follow the principle - the picking that takes the least effort and that's the simplest possible is usually the best option. So, minimize the string skips and always try to advance to the direction where the next note is going to be picked. You'll get a hang of it in no time.