Just to expand on WD's post, I found that I get much more life out of my camera battery if I turn off the LCD screen and use only the optical viewfinder. I also turn off the auto review feature, which momentarily displays each shot on the LCD screen after it is taken.

And I also resist the temptation to review my work every night.
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If you only travel on sunny days you will never reach your destination.*

* May not apply at certain latitudes in Canada and elsewhere.