SpellsOfMagic.com and WiccanSpells.info both list an assortment of good luck spells. The amount of time it takes for a spell to be completed varies. For example, the caster must perform some spells on a set day of the week, over a seven-day period or the midnight of a new moon.
One quick good luck spell that doesn't require a certain time period or any additional tools simply requires the caster to say, "Luck so low, make it high. I really need this. Please reply." Other spells require items such as candles, herbal oils, stones or money. One element necessary for performing spells is that the spell caster holds the positive feelings and vibrations of the ritual in his subconscious mind.