Taking too hasty step of how to get your ex back by repeated calls with no response

For some of the persons the moment of an imminent break up in relationship is a nightmarish experience posing difficulty in foreseeing what shall happen next. For them the next begins with thinking of how to get your ex back ?
 
For thinking of the right approach in getting ex back, there is necessity to know:
 
1.         What were the sequences of events resulting in this ill-fated event?
2.         Some times the things happen so suddenly it gets difficult to comprehend the whole situation.
3.         Has the Ex took the decision most abruptly and has moved away not to be together again?
 
What ever is the present state, it is a moment to learn what not to do in hasty manner and save the relationship in getting worse further. There are certain mistakes which are very common to occur in case the careful plan is not thought of for implementation.
 
The most common mistake which is done first of all is calling the ex again and again with no response from the ex. It is just like taking an ineffective antibiotic producing resistance requiring more potent medication.