Always treat the prop as LIVE but in addition never get into or out of an aircraft with the engine running.
I was just about to start a SE aircraft one afternoon and when i say start I mean a millisecond away from turning the starter and someone popped up in front of me grabbed the prop and shouted. "I will just push you back a bit further"!
Thats why you always shout CLEAR PROP STARTING and I always did after that!