If I'm understanding your question correctly, I guess currently when I start to feel negativity or despair dragging me down that's when I make myself go for a jog. Of course, I can't rely on that always being an option (case in point yesterday after seeing W's car), so I will think about what I can do more universally.
I have seen it posted to several threads about snapping a rubber band against one's wrist when they had triggers occur. Seems like that might work!
Me:36 W:30 M:2.75 T:7 BD: 4/2015 ILYBNILWY: 5/2015 W Moved Out: 5/2015 W filed for D: 7/2015