Setting up a workshop is a useful step for a Magus. it is not entirely necessary as there are many mages both past and present who have practiced mage craft without the aid of a workshop but for many mages it is a useful base and a safe haven for their craft.
The workshop is where a Magus keeps their Grimoires as well as the materials for their rituals. It is also a place for them to practice spells and channel energy.
It is best to set up your workshop in a place that you have a special connection to like a childhood home, somewhere that has a connection to nature, or has a potent history to draw from.
Altar
Once the location for the workshop has been chosen the next thing to do is to set up the Altar. The Altar is the center piece for magic spells and can be personalized to fit your needs. It can very in size from a dining table to a shelf or a mantelpiece depending on the size of your workshop or the location where you are casting the spell.
What you put on your Altar and how you decorate it is entirely personal. Whether you have a table made from natural wood or use a table that has been in your house for years, whether you decorate with a purple cloth or spread a variety of gemstones over it is completely up to the individual.
Pentacle
The five pointed star is one of the most important objects in spell casting. The Pentacle, or Pentagram, is believed to date back to Mesopotamia and has been an important symbol of spiritual protection for many religions including Alchemy. The five points on the star represent the key elements of magic: fire, water, earth and air while the top point represent spirit or in some cases void.
It is recommended to always have the Pentacle on you or your altar when ever you are casting a spell. It is best to charge it before use by leaving it in direct moonlight during a full moon to increase the potency of a spell.
Candles
Candles play an important roll in magecraft. They represent the elements of air and fire and most rituals require at least one or two candles, it is wise to have a variety of them in different colours in case a ritual calls for one in a specific colour.
Incense
Incense also plays an important role in rituals and helps to boosts a spells potency. There are many different kinds with many different effects.
Basil: Is used for prosperity and attracting wealth as well as being used in fertility rituals.
Eucalyptus: Used for balancing emotions and is helpful when making tough decisions.
Frankincense: It is a good spiritual cleanser and can be used to help people who are fighting off an illness.
Opium: Helps with sleep and psychic abilities and can help those dealing with Insomnia.
Sage: It is commonly used in smudge sticks and is burned to cleanse a space of negative energy.
Sandalwood: Has a pleasant, warm, gentle smell which is good for relaxation.
Ylang-Ylang: Is useful in love spells to attract love as well as harmonizing marriages.
Soil and Water
It is recommended to have soil and water on hand for certain rituals. Soil represents the element of earth and is used in spells for prosperity, material needs and stability. The soil should be from a place that holds a personal collection like your childhood home. Water is used for spells that relate to change or cycles and should be gathered from either a stream or rain.
Literary Source
Wiccapedia