Here's how to make the most of your range time: Hit at least half of your warm-up balls with your wedges. I start with my lob wedge, then hit my sand and pitching wedges, changing targets every few swings until I'm in a groove. Only then do I move to the longer clubs, before finishing with a few more lob wedges.
Another tip: Focus on just one swing key. While hitting wedges, I often work on keeping my right foot on the ground through impact (left). This helps stabilize my lower body through the shot.
Try my warm-up routine before you play your next round. I bet the benefits will extend to every club in your bag.