In its most basic form the key to visual navigation, IMHO, is:
1) the ability to fly a consistent heading/track
2) speed/distance/time to next check-point/destination
3) good map reading skills - look at the big picture
4) 10 nm/time checks along your track
5) 1:60 as required
6) know where you are at all times!
It still fascinates me how we used to find a spot in the middle of nowhere using the above!
Dr 