I find that talking to myself is useful when I have to go out to the shed for a tool.
By the time I get there I sometimes find I've forgotten which tool it was, because I'm always pondering different ways of doing the job.
However, I CAN remember hearing myself say "I need a #3 Pozidriv !" or whatever.

Nowadays they reckon stress and depression is mental illness. I always have had a job that involved that mildly and occasionally. Angling was my substitute for therapy.