Murphys law being what it is, and applying doubly to helicopters, you should have and always follow your preflite checklist to a T.
The one time you don't is when your gyro connection will come off in flight
because it loosened up on the last one.
It's not a bad idea to keep a flight log like full scale pilots do either. I use it to monitor battery health, belt retentioning requirements, etc.
It's also surprising to see what I forgot I learned last year.