Ill built a defense against the challenges of life by making my self strong. That comes first. He who knows how to be brave, knows how to handle even the draining and worst problem that life may give. Secondly, Know your weaknesses. This is the most challenging factor. You shouldnt give a dmn and let that beat you. That will be pathetic. Third, make your self flexible. Life it self, may be so ironic at times so deal with its irony with these three factors to be better and achieve better.