General Steps
Candle magic can be quite a complicated procedure, but these steps should help make it a little easier.

1. Choose an appropriate color:
The color of the candle you use is your first concern. You must correlate color with the goal you have in mind.

2. Cleanse the candle:
Remove energies infused into the candle during the manufacturing process(Unless you made the candle yourself with a particular goal in mind).
3. Consecrate the candle:
dedicate the candle to your purpose. There three methods in which to do this, any or all may be used

A cleansed and consecrated candle should be used for one purpose only. If you prepare a candle for prosperity purposes, don't use it for anything else. You should decide how often and for how long a time your are going to burn your candle. Choose your candle size according to your purpose. If your goal is very important, you may wish to burn your candle every day for several days, which means you must use a very large candle. An alternative is to use several smaller candles and burn one each day. If you choose to use smaller candles remember to cleanse and consecrate each one before use.
When you light your candle, do so consciously. Be aware that fire has an affinity with the spiritual plane.

Remember the Rule of Three and the Wiccan's Rede: "An it harm none, do what ye will".

Source: Nixie Email: Sun, 1 Jan 2006