Taking the time and making the necessary preparations to make your spell-casting successful are key skills of the experienced witch. Magic Spells, rituals, and incantations can be used for good or evil, but much of their power lies in the will or intent of the caster and the skill with which that spell-caster performs the magick spell, ritual, or incantation. Magic Spells, charms, and rituals can be used as originally written or created by someone else. They can also be altered or designed specifically for a particular purpose. Generally, the more experienced a witch is and the more focused a spell is, the greater its chance for success will be.
Spell casting, when performed properly, is probably the single most important component in achieving success with your magic spells and rituals. You can never go overboard on an investment of time and energy into the preparation and execution of your spell. Casting spells "on the fly" almost always leads to failure. Be wise, take the time and care necessary to make your spells successful.
The following links will lead you to various aspects of the spell-casting process. As always, proceed into this art with caution and care.
Book of Shadows
Spells and Magic Categories
Symbols - Symbolism - Sigils