One important button is the little 'flower' icon. That makes for extreme close-ups (macro's). Great for fly pictures. Make sure the flower is displayed and press the shutter half way until it focuses then shoot!
Your manual will tell how many shots to expect. The higher the picture quality, the fewer pictures.
I found the best life with nickel-metal hydride batteries, They don't seem to mind short-charging either. Look for them with at least 2300 mA, more horsepower!

I heard the WP doesn't have regular view finder. That could be a problem in bright sunlight.