- Get familiar with the "technique/mechanic" behind it. FAON counters your vector right away as soon as you stop doing something.
- FAOFF keeps your vector, you have to do it manually. Get used to "glide" and use the vector.
- Watch the space dust, it shows your vector! To counter it apply thrusters in the SAME direction the dust goes. The background stars are a good reference point too. if they move, you move too.
- Start with docking/undocking. Turn FAON if you lose control.
- Use thrusters (all directions) often to correct. if just gliding put throttle to ZERO. Using it in many short bursts seems to work better for me.
- When docking on outposts: Boost to 5 km, then slow down try to land...if you got it, boost to 4 km...3km is very, very close! - start in combat with easy targets.

Good tutorials:
https://www.youtube.com/playlist?list=PLtywH7XtIZ0OJd8EM8TKw-fTGGCWJCSoq
https://forums.frontier.co.uk/showthread.php/384880-Guides-I-Finished-my-Flight-Assist-Off-Beginner-Series!?p=6034537#post6034537
(^^Playlist https://www.youtube.com/playlist?list=PLIQVVKXGd78AiYjhGUNZL9dFm23hYgc8R )

A FAOFF landing on an Outpost by the author
https://youtu.be/kVRIy4iXDLA?t=5m31s