I would say there is just more ritual involved. It can become very complicated and complex. In my experience the more complicated it is the more possibility there is for something to go wrong.

This could involve making your candles with knotted wicks.

Using crystals on your cleansed space with the candles, this may help you focus the energy etc.

Using talismans, hexagrams etc. These can be used as a base for the candle holder to sit on and then burn when the rite is completed.

You could use several candles at the same time in a specific layout, Buckland uses this in his book on advanced CB rites.

You could use photos/personal belongings to help focus your mind.

Using a Tarot card may help some people focus.

Whatever you choose to do, if it does not help the focus of the rite then it is not necessary.

My advice would be to follow your gut feelings. If you're a beginner you could use a book etc. but remember you are using someone else's spell then, not your own and it may not work for you.