Don, don't feel too bad
I have at least one recurring habit,,,,that one that happens every start of session
The very first time I go to paint with the airbrush, every single first time,,,,,,I get it all set, and push the plunger down,,,,,and nothing happens,,,,,,,then,,,,,I connect the quick disconnect on the other end of the braided hose
after that,,,,,not every time, but far too often,,,,,,I push the plunger again,,,,,,,and realize that now might be a good time to start the compressor up and fill the tank
once I am over those two humps I am pretty much good to go,,,,,,unless I use a paint brush and go to clean it and find out I didn't get a jar of thinner to swish the brush into,,,,,or something equal to that, that should be automatic each session
Rex