sorry for being unclear to strengthen your will you must exercise mind might and magic all work like muscles my friend. you exercise your will any time you make a choice or decision and choose to stick to it like sticking to a diet or doing things you dont want to, because to circuvent anothers will you need to make sure that your own will is under control and that your mind doesn't wander or you go back on your decisions. Many spiritualists use sel denial to increase there will over themselves acts like meditating and actively clearing the mind, fasting from food orobsering some kind of personal taboos, refrain fromlying or making promises that have a doubt of being kept. so any way you can think of being able to control yourself and your mind is a good method of strengthening will.