One way to increase a spells success is to forget about them for a few days after it is cast. Plus having zero doubt in the magickal working or else it will fail rather quickly
You may need to give yourself time to grow, focus on meditations and visualation, learn how to raise and direct energy. Think hard about the spells you cast and commit yourself to them. The mind is a powerful thing
"Ok, the first part was supposed to say: how do you "will" something to be or happen?"
It depends on the spell. You could say I'm already in a hypnotic trance clear of thoughts every day of my life so I don't bother with meditating. A spell can be cast without gathering energy, but I find it more powerful to visualize orbs of light floating all around me with my mind's eye and with my physical eyes by spacing out into the distance, and pulling them into my body.
Following that I visualize the desired outcome of the spell. The longer you can focus and keep the image, the more "weight" you add to the thought. The more "weight" added will further increase the power and effect of it. While maintaining the thought I lower into a deeper state such as Beta, and begin to focus more and more intently on it to the point that my body physically begins reacting to it and letting your emotions flow through you as with the energy. This part I guess would be called willing it.
From there, chanting the incantation while holding the thought, burning desire, willing it to be, fully believing it will come to pass without a doubt, insert thing here. After casting, I continue to hold the thought, direct my energy into the spell, and release the thought after I feel enough time has passed.
That's a basic walkthrough of casting a spell, and this is just the way that I do it. There are many methods, but whatever yields the best results is what you want to stick with.
