I remember Robert Pursig in ZatAoMM saying "good good good good..." on a run and I do that sometimes.

When I'm out of breath I inhale on nnnnnn (my tongue cuddles around my left front tooth, because it gets sensitive to the air going by) and exhale on wwwoooooo.

When I'm on the rollers and I get mad thinking about work, I recite Psalm 23, because the "preparest a table for me in the presence of mine enemies" part always cracks me up to picture a conference room table with annoying work people. I'm never sure how the 'still waters' part fits in my life at all, but the "restoreth my soul" part is spot on for riding.