Ross's videos are VERY helpful imo. When I started my worst section was angle ranking. I read about techniques too, and tried to apply them..but it's completely different when you actually see Ross go through his techniques. His rapid glance technique works like a charm! And going straight to comparing biggest/smallest angles in the answer choices increases your overall speed in the section too. And I found out that in order to make it easier to use the rapid glance technique, for the angles that have one line sticking out or when comparing a "mini angle" as I like to call them compared to a "normal sized" angle, you can cover up the edges and only expose a small portion of the angles. Basically this gets rid of the confusion caused by relative sizes of the angle images, or the lines that stick out.
Normally this added step does not need to be used, but for angles that are very close (differ by about 5 degrees), I find that actually covering them up on my screen helps a lot.