I use a blindfold..... When practicing "touch" playing I put a piece of tape on all the A keys. Once I slide my thumb to the A I know where everything else will be.

And WHAT you practice matters. I still do Hanon method scales every day, always with a metronome. Start with C, add 1 sharp to G, add another sharp to D, add another sharp to A..... Left hand, then right hand, then both hands. Helps a lot in trying to overcome the issues from the arthritis in my hands too.