The phrase will power is oftentimes misunderstood because the reader focus on only one of the two words, be it will or power. In either case of the two then the phrase will power is at risk to be misunderstood. Therefore, before going into depth of answering: How to Develop Will Power let us first take a look on some definitions.

Will power is quite often defined as the strength to carry out one's own decisions, wishes and/or plans. A person can have and exercise power without having will power. And the idea of the will is a completely other story; will alone is quite often associated in other ideas, such as the free will or the good will.

Although people who are powerful and mighty are looked up to quite frequently, it can actually be said that power over one's self is a much more daunting task to accomplish, and thus people with great will power are often respected even more.
Developing will power can be a life long journey but due to the large effect it has on your life, it is definitely important to learn how to develop will power. Whether you are trying to stop smoking, lose weight, or just become more in control of yourself or your life in general, then by far strong will power is the most valuable personal goal you can set.

When it comes to developing will power, there are a few things you need to understand prior to starting your journey of personal development, this understanding will make it a lot easier for you. One of these is the art of goal setting when you set a particular goal, such as weight loss. You must be realistic and true to yourself about this or other goals. Do not attempt to set a goal that will be almost impossible to reach. In fact, do the exact opposite! Start out small by defining smaller steps on the road towards the final achievement, and gradually the goals will be easier and easier to accomplish. It will have a psychological effect as you achieve multiple goals in a row, and you will feel more confident about successfully completing harder goals as well.

Make sure you measure your progress in some fashion so that you have data of some sort to evaluate your achievements. What is the point in accomplishing a goal that you cannot even show (to yourself or others) when you have accomplished it? Learn to prioritize your goals as well, this will help you to develop will power. It is hard enough to accomplish one daunting task, let alone accomplish multiple ones simultaneously. So do not attempt to do too much at once-pace yourself.

Find others who want to develop will power as well. Humans are competitive minded and fulfilling needing creatures, whether it is our own needs or the needs of others, and because of this then it is easier to accomplish a goal when you have the support from other like minded people.
Join a support group or club of people who strive for developing will power and you will find more success as you will want to achieve this goal for yourself, but you will also appreciate the satisfaction of knowing that you contributed to make other people happy as well.
If you follow the advice in this article, then the road of How to Develop Will Power will be a happy journey on a long road leading to a happy goal.

Many philosophers have dealt with the questions about the will and/or about power. Two very different approaches to this are the thoughts and ideas of Soren Kierkegaard and Friedrich Nietzsche. You can read more about this in two of my articles:
The Philosophy of Life Found in Soren Kierkegaard Quotes
Will to Power by Friedrich Nietzsche