If you're not already, and if you can, I recommend finding a range that allows you hit off grass. In my experience, spending a ton of time at the range hitting off mats can form some bad habits.

Another good warm up / accuracy drill is to chip a ball, then chip the next one so that it lands on/next to that one (and rolls out), then chip/pitch the next one so that it lands on/next to the second shot (and rolls out), and repeat... This will help you get feel from your wedges up, distance control, and learn the roll distances. I've heard that some pros start off with this to warm-up (which is really similar to just working from the short irons up).