What r the best ways to get revenge!!!!?

o.k, i dont want any " forgive and forget crap" if thats all ur selling, go someplace else, i want only people who know how to get revenge to answer!! i have an ****** of a dirtbag in my life and i have to work with him on a daily basis, i want to make his life H-E-L-L !!!!!!!!!!!!!! ( karma bullsh$#%t!!) now gimme the goods , whats the sneekyest, worst way to get to him,i wanna make him scrim like the worm he is, i wanna make him beg for mercy( and save ur seek help crap too thank u ) i work with him, have access to his address, phonenumber, and car, come on help me out, tanks!! :)