In Canada, this is time for "The Great Turnover", which is when we pack away the lawnmower, and bring out the snowblower. I have a small spot in the shed for them, so I have to make sure of the exact timing. It would be horrible if we had a warm spell and the grass started growing! No worries this year, since the forecast looks miserably cold for the next week or two.
Thank God for gas stabilizer! I just throw it in the lawnmower, and run it for 5 minutes. This lazy method has always worked for me! For the snowblower, I just change the oil, since in Toronto I'm sure I'm using 1% of the designed duty cycle for these things. I always get new gas at the turnover, winter and spring, since this is the best thing for easy starts. If I have extra old gas, it just goes in the car. This year, the lawn mowing was ridiculous and I had no extra gas.