Hi Sushman,
Here is a favorite of mine. it is from William Walker Atkinson, before he became Yogi Ramacharaka. Maybe you will find it useful:
The Master Formula of Attainment:
You must:
1)Know exactly what you want
2)Want it bad enough
3)Persistantly determine to obtain it
4)Confidently expect to obtain it
5)Be willing to pay the price
They are all important but the last one is the kicker.
What exactly is it that you want, what are you trying to achieve and what do you have to give up in order to obtain it?
Will power is the manifestation of desire. If you have no desire you will have no will. The bigger this desire becomes, the more will power you will have and not vice versa. It will eventually swallow up the lesser desires.
Most people have plenty of will power (but it is from building up the wrong desire in the past, i.e., the one they are trying to get rid of now); it is the won’t power that they need that they will get from building up their present desire. Once that desire is sufficiently strong they have no problem saying no to the old desire. It is the transition stage that is the hard part. 
You build up desire by thinking of all the benefits of obtaining it and clearly recognizing how your contrary desires are preventing you from obtaining it. So you contemplate the benefits and the rip offs of either course of action without any kind of fight within yourself. Just recognition and taking credit for what ever desire you choose to indulge as a result.
That is my take on it right now.
Best, yb.
Thanks YB and Paw.