General Advice

Take C. P. E. Bach’s advice and practice memorized pieces, chord progressions, and technical exercises in the dark, or with your eyes closed.
Be aware of the keyboard at the bottom of your visual field. Without actually looking down, you can nevertheless see the keyboard to some extent in your peripheral vision.
Become intensely aware of the contact of your fingers with the keys. Your fingertips are your connection to the piano, and the quality of every sound you make depends on their sensitivity to the movement of the keys. Silent practice (touching the keys without sounding them) is a good way to develop this sensitivity.
Use the black notes to find your way around the keyboard. The alternating groups of two and three black notes make it possible to find any note on the keyboard without looking down.