Learning to properly cast magic is needed for spells to cause an outcome that is some what acceptable.
Now you probably want to know how to properly cast a spell.
First things first learn to meditate. This is where you will learn to gather and redirect energy. You will also learn to feel the energy and the different types of energy for different sources. As you meditate you will learn to move the energy from one part of your body to another. Over time you will be able to concentrate energy in your hands and then release it. You can also do this through your feet and head. In fact a skilled energy worker can release energy through any part of their body just as they can gather it using any part of their body.
So after you have learned this it is time to learn how to manipulate the energy you gather. Here you take the energy and focus on it turning it into the outcome you wish. This is a mind over matter idea. If you wish to turn it into luck energy then also use items that contain luck. Such as a rabbits foot, a four leaf clover, a horse shoe, etc. to help you change the energy you gathered into luck energy. Now you want to release that energy into the universe. Make sure you stamped it with the person you wish the luck on. This can be done through a picture or a personal object.
The most important thing to remember about casting magic is that you have to focus on the energy turning into what you want. It is not just a matter of wishing but of changing the energy around you so that you get the result you desire.