I think burnout can occur from too much "same ole, same ole". You have to mix it up, or your brain will cramp.
Part of the wonderment of working in the public for so many years has been the "newness" that each job brings....even the steady ones. There is ALWAY something new to see, hear, feel ..... it's up to you to find it, and relish it.

Mental "carpul tunnel" ( NOT a real mdical condition ) is avoidable ! Just provide more stimulous to your creative side. It sounds like you have the mechanics down already. It's like golf in a way .....
You PRACTICE on the driving range, but come game day ..... you just PLAY.

Now, go out there and JUST PLAY!!!!