"ClearProp" - we liked the idea so much we bought the company
(Check G-INFO if you what to see what I mean)
Always yell clear prop when starting.
Always flashing beacon / anti-coll lights on before starting.
Anything to attract attention to a potentially dangerous, soon-to-be-rotating propellor.
I remember when I did my MEP training I was told loads of reasons why you shoud start port-side first, ranging from the absurd ("we always do, and its the way I was taught"
), to the ridiculous ("the battery is on the LHS so the wires are shorter")
Maybe the real reason is because you can (generally) see very clearly who/what is around the port-side engine(s) so starting them first may alert someone who is sleeping near the RHS ones (which are less easily seen from P1 seat) to move out of the way...