I do most of my guitar practice seated and can easily see the strings when I'm playing solos or arpeggios. But when I play with my friends, I'm usually standing and can't see the strings to pick. I'm not horrible at it but I definitely notice my confidence suffers and I make a lot of mistakes with the pick. Since I'm not likely to start practicing standing up, are there any specific drills or techniques to use to improve my accuracy with a pick?
I realize just not looking is a drill in itself but I'm wondering about any specific drills to focus on this aspect of my technique. One thing I've tried that seems to work fairly well is to sort of visualize the six strings and just play to an imaginary image that I would see if I was looking. This works fairly well but seems a bit distracting from my playing. I mostly play simple blues and rock tunes.