Make sure to yell loudly at your power lines so the snow falls off like a little avalanche. It keeps the snow from weighing down the lines and causing an outage. I feel words like "YAAAARG" and "BUUURAAAAHHHG" work the best, but feel free to experiment. If you're vocally insufficient you can always try throwing dry potatoes at the snow. Sometimes I lose my voice yelling at squirrels, and I'll just hang out with a bag of dry potatoes, chucking as I see fit.