I believe that pilots who fly amphibious airplanes are less likely to land with the gear up on a runway than pilots who fly straight retractable gear aircraft because they are used to identifying the surface they are landing on and making sure the gear selection is correct for the surface they are about to land on.
In other words.......don't land until you are sure the gear is in the correct position.
I never ever landed without my turning final check being correct.
My check is::::
" " Where am I landing and where is my gear? " ".
Twice during my career it was in the wrong position, both times turning a short final and I had to go around.