I'd suggest working with Chakras, but if you want to use voodoo ...
To Banish Anger
From The Spiral Dance by Starhawk
This spell needs to be done alongside flowing water.
A private corner surrounded by bushes at the side of a
stream is a good place.
Cast a circle. Cup black stone in your hands and raise
it to your forehead, concentrate and send all your anger
into the stone. Do this for as long as you can, until you
can do it no longer, then hurl the stone with all of your
might, into the water, and say:
"With this stone anger be gone
Water bind it, no one find it!"
Place your palms upon the ground, for a few moments to ground
the power, and allow your circle to fade. Now go home and take
care of yourself, for you may feel depleted for a while, but you
will be better. Alternatively, you may feel better straight away.