Lots of great tips here from a trainer. I liked these:
“Justen is a big proponent of breathing audibly on the route to hear yourself. Getting me to
breathe more audibly while climbing—not in a weird, forced way … but rather naturally—was really helpful.
Warming up: Two routes, each climbed back to back. If you can’t climb a route twice in a row, it’s not a warm up. On the first time up, notice things that you do wrong and on the second time up, eliminate them. Take care of whatever it is that’s going badly on that day, right away on the warm up.
Warm up the eyes, too. Look around and try to get your focus going. Focus on particular things and notice them. Get your focus working so it’s very precise.”