I have owned a series of older sailboats (emphasis on older) and always enjoyed challenging myself Great Lakes sailing solo... e.g. setting the spinnaker, etc. I was approached by a man who began to ask me about certain techniques. I said, "There are a lot of guys in the clubhouse who have been sailing a lot longer than me. You should ask them." He responded, "You tell me about your mistakes. They don't."
I like this thread because it allows us to reveal something about ourselves... fear (real or perceived) and how we overcome it. It also says something about ones ability to reveal cracks in our own armor.
I typically work alone when I dive (even having a safety diver up top is more of a mental comfort if you aren't using communication equipment). Of course, the primary mind distraction is in the details of the job itself... mentally picturing where you set a wrench or a clevis pin... gas, depth, time, entanglement awareness, etc.
I will never be the perfect cave diver (which is an aspect of diving that I am fairly new to), but I will be myself in how I approach it. It will always be a balance of both the physical realities and the mental. I suppose that's one reason that I love it so much.

