Yes. Fear. Keep it with you always. It may save a finger, hand, foot, leg.
Chainsaws are the most dangerous tool I use.
For normal-size stuff, a sixteen-inch bar is adequate. Better to have it
overpowered rather than under. So buy a Stihl or Husky that will take an
eighteen or twenty-four-inch bar and buy it with a sixteen.
Learn how to sharpen chains. Keep them sharp. Maintain the saw perfectly.
Read the instruction book three times before filling the fuel tank.
Wear heavy boots, trousers and leather gloves. Ear protection is good,
especially if you like music or having someone whisper in your ear. Stay scared.