Focus, concentration, meditation, and belief in self and your spells are what I call the core basics. These you should to practice them as often as possible. You can never have to much of each. Except the belief in self. Listen to others as well.
The others are symbolism of each independent object. Like what the waxing moon is best for, what the waning moon is best for, what a red candle is best for, so on and so forth. Knowledge of these are infinite, but it's best to take it one at a time.
Well those are the basics as I see it.