Very, very, very rarely and only if I am in a reasonable mood.
I found that sometimes, basic grinding might help me temporarily help me shift focus and calm down (I mean REEEAAAAALLY basic grinding, of the Pokemon or collect all the treasure chests in Assasin's Creed type), but it doesn't work if I am too stressed or depressed.
To tell you the truth, if I am not feeling too good with myself, I cannot enjoy a video game, so I avoid them in any form.
Playing the guitar, walking it off or simply watching one of the living-room walls are my stress reliefs.