Or is not saying anything at all more effective?
Most Helpful Guy
Most Helpful Girl
DON'T keep your phone around when getting drunk late at night in the club with the girls
angry or teary text messages and drunk calls will only reassure him he took the right decision when dumping you
meet up with lots of people, fill up your time with activities (no watching tv, no Facebook, no laying on the bed looking at the ceiling), you'd better go out, have fun, talk to lots of people, learn something new - it will fill your mind and won't leave space for the bastard.
you can also try to write it down. post on the forum, start a journal or start a blog (I just found this journal for dreams - lovely https://dreamophone.com) whenever you feel angry, write him a letter, insult him and describe in detail how much of a jerk he is and the specific methods you would use to torture him. and of course, destroy the letter afterwards :)
this work for being angry... however, I'm not sure how we should deal with the sadness...