As a sufferer of PTSD (thanks 20 yrs of military!!!), I find that when my stress builds up to the point of not knowing how to calm it down, if I pick up a handplane and a pc of wood and just start making shavings, that's the most relaxing thing I can do. With absolutely nothing in mind to do with said pc of wood, I'll just plane away making nice, long, thin shavings. As much as it would pain me to know that I just handplaned a pc of $15/bf pc of anything down to nothing, the $15/bf was much cheaper than any drug or therapy I could get my hands on, so it's a win/win for me.