I just turned it off and never turned it back on again. 'twas the quickest way to make it second nature.
Sure, picking up mats or placing charges was awkward for a good while, but now it's more awkward for me to do anything FA On, so I don't. I can place seismic charges and still manually detonate because there's so much time left, I pick up every mat dropped by an Anaconda NPC before the mats reach 0%, and so on. All of this is no big deal now because FA off feels the new normal. On a couple occasions I have restarted the game and left the station forgetting that the game defaults back to FA On. Immediately as I leave the landing pad I feel it -- I'm driving with the handbrake on.
Crutch, most effective, I don't care. FA Off is the only way I want to fly a space ship and I'm salty every time I have to fly SC because the dampened flight model makes it feel like I'm flying in thick soup.