Recognise where the feeling is coming from, and notice the
direction it is moving. Is it moving in a circular motion, clock
wise or anti-clockwise, up and down, inside out etc?
Then reverse that energy flow. It sounds kind of weird I know, but
it really works. That's one of the technique we apply in NLP for
anger management.
Test it out. You won't know how it feels until and unless you
personally test it out. You won't be able to estmate how it will
feel like just by sitting there and imagining.
Similarly for all the other advice given, no results will be out
until action is taken. If one method fails, then go for the next
one.
Taking deep breaths usually help too! 
