The poor lad's at EFT, on the Nav phase. The art of Radio Aids Nav, at low level, might be stretching things a little.
BV's advice?
Don't plan legs too short becasue your work rate will be too high.
Always, always pick waypoints with lots of vertical extent (Lincolnshire reservoirs always look awesome on the map but will screw you over every time!).
Thirdly, and by far the most important, is relax. Whilst spending every waking hour route-studying seems like it'll bear fruit you need to make time to chill out. Get to the bar/gym/cinema (whatever floats your boat) occasionally.
BV