The first step in making meaningful changes in your life involves gaining a better understanding of yourself in essential areas that impact your life. This self-knowledge can provide you with direction as you try to maximize your efforts at change. Self-knowledge can also help you be more efficient and focused - and more effective - in producing change because you'll know precisely what you need to work on.
Think of your strengths and weaknesses for getting promoted in a new job in, say, banking, as a mathematical equation. On a scale of one to ten, where 1 is very poor and 10 is the best, if you have very good financial analysis skills (8), but you are quite poor at relationship building (2), then your over-all performance would be moderate (8+2=10 out of a possible 20). If you focused on and improve your analytical capabilities (say, from 8 to 9), you wouldn't improve that much over all because you were already capable in that area of your work (9+2=11). But if you improve your relationship skills (say, from 2 to 6), then your over-all performance would rise significantly (8+6=14). Of course, you want to continue to build your strengths, but the more you improve your weaknesses, the better you'll be able to make the changes you want.
Self-knowledge is a powerful tool for building the "infrastructure" necessary for change. With it, you have the information you need to focus your time and energy on exactly what you want to change and also have taken the initial step in identifying the process to facilitate that change.
Please refer the following link for complete article: http://www.psychologytoday.com/blog/the-power-prime/201201/personal-growth-know-thyself-is-the-first-step-life-change