One of the best things I ever did was to write down the lyrics and chords to every song I ever played (well almost).
Now with my android phone and laptop I have constant internet access and often download a song on the job and play it.
Of course then I have to go home and learn to play it right.
Probably 80 percent of the songs I do regularly I don't look at anything except the whites of their eyes, or other parts of their anatomies, depending on the visual excellence. Sometimes I pretend I'm looking at the keys because if I don't they think I'm not really playing.
DonM