During the "stay-at-home" order, I posted a couple drills that you could do without a golf ball. Now that the golf course and practice facilities are open it seems the lure of the driving range and smashing balls is more exciting. I'm not saying don't go to the range at all, it just can't be your only practice.
Recently one of my student's shared an article that was posted in Golf Digest back in February 2012 by Managing Editor Roger Shiffman that echoed the benefits of practicing your swing without a ball. It is great read.