Spells work best in tandem with nature's mysterious, magical and powerful objects. Of these, the moon is number one on the list for spell-givers.
The following are some refresher notes on spells and the phases of the moon.
New Moon / Dark Moon
Just like the full moon, the new moon (or dark moon) is the most opportune time to remove things from our lives. It is usually the time when you are most powerful in spell-giving.
This is a good time to reverse spells others have cast, ideal for banishing spells and focusing on the replacement of any negative effects all around.
However, keep in mind that when asking for something to be removed, there is a void left open. Ask for something positive and fill up that space.
To prevent a waxing influence on your spellwork, the banishing spells and rituals must be done before the beginning of the new moon. The most powerful time for spells is three days after the appearance of the new moon.
Black Moon
When two new moons appear during a single month, the second new moon is regarded as the stronger of the two. This is the best time to cast spells that deal on addiction.
Waxing Moon
The time of the waxing moon to full moon is the best time to cast spells on situations and events that concerns us. The waxing moon is perfect for spellwork regarding success, protection, abundance, friendships, luck, new beginnings, and love.
The waxing moon is wonderful for good, constructive magic.
First Quarter
This is the mid-point between the new moon and the full moon. This is the time most ideal in focusing and meditating on attracting new positive things toward you. These things will grow as the moon waxes.
Waxing gibbous
This is the perfect time to focus on fruition and completion of your spellwork, and the time to focus and meditate on all the spellwork you did during the waxing phase.
This is also good to do any magical work on prophecy, protection or divination.
Full Moon
This is the time to meditate on the divine power of the universe and pray that it shall also strengthen and empower us. The full moon imparts the strongest power for all invocations and spells.
This is the time to cast your most powerful magic spells. To avoid a waning influence, cast your spells and do your rituals before the exact time of a full moon.
Blue Moon
When a month has two full moons, the 2nd full moon is deemed the stronger and more powerful. For your spells and rituals that need an extra kick, this is the time to do them.
This is also the time to meditate on your life's goals and to assess your successes and failures.
Waning Gibbous
This is the best time to banish the things we don't want anymore in our lives. Plus, it is time to meditate on cleansing and removing all negativity around us.
Last Quarter
This is the time for ending things, much like the moon going to the end of its cycle. Focus and meditate on balancing your body's energies, replacing negatives with positives.
Waning Moon
The time of the waning to the new moon is also the best time to remove unwanted circumstances in our lives. Cast banishing spells against enemies, addictions, sickness, negativity, and evil. Cleanse yourself of the things you no longer need.
Reference: http://way-of-witch.blogspot.com