When doing Candle Spells, there are a few things you need to consider before attempting to complete you'r spell. They are as follows.
FOCUS = Magickal Herb Table. Gems, Oils, and Incense formularies. Will the spell need a Deity Push? (invoking the God/Goddess of you'r choice) or maybe just the invokation of the Elements. How much power will the spell need?
INTEND = What is the spell really for? Decided what it is that you really wish to accomplish before starting, and keep these thoughs going as you are completing the spell.