dog-rose:

Ok so I am gonna say this is my personal reference, its mainly through associations. You might TOTALLY disagree and thats chill!

Its more something to think about and a guideline of what I use myself…

Candle Magic:

Carve a candle when…. the candle represents the target, in sympathetic magic. When, essentially, the candle is a poppet and lighting it is a symbol of destruction or empowerment to the target.

Place something under the candle or before it when… you are doing general candle magic, when the candle represents empowering a wish, idea or concept.

Anoint the candle when… doing work with spirits and gods, when you mark the candle for a special purpose, when doing high magic.

Herbs and plant work:

Use dry herbs when… it is convienent to do so, when the herbs are out of season or when you need to store them in a jar or bottle for a long time.

Use fresh herbs when… the spell is very earth orientated, when doing magic on behalf of another or when the magic is sympathetic so that the herbs represent the target, within kitchen witchery.

Use flowers when… when the spell concerns love and sex, or perhaps fertility and attraction, due to flowers being the reproductive parts of the plant.

Use fruit when when… working with children as a target, or with children practising. When you work with fertility and abundance spells.

Use wood and twigs when… when the spell is for protection or binding, for hardiness.

Burn herbs (recaning/incense) when… you wish to cleanse or banish, or invoke an atmosphere - that being, for divination using herbs that are said to open up your perceptions, when banishing, burning acrid or pungent herbs.

Use oil infusions when… you wish to anoint something, when you wish to mark something permanently.

Use floral waters (rose water etc) when… dealing with spirits and gods, for glamour as it has a long history of being used to beautify.

Crystals:

Use metals (haematite, copper, ores etc..) when… you work in protection, when you do energy work due to the conductive properties of metal.

Use shell, pearl, coral and such when… you work in sea magic, when you work within emotional magic due to the element of water.

Use points when… you wish to direct magic to a target.

Use tumble stones when… you wish the magic to be gentle or manifest at a certain place on the body on a target.

Use geodes when… you work in protection, when you work with glamour aimed to obscure and hide.

Knot magic:

Use cotton when… it is convenient.

Use silk when… doing spells that benefit the target.

Use ribbons when… love spells and wealth spells, as well as confidence and beauty spells. Spells to ensure victory.

Use rope when… doing spells that aim to hurt or weaken the target, binding especially.

Poppets:

Use cloth when… the spell aims to benefit who the poppet represents, use particular care when sewing or cutting, choose colours that are appropriate to them.

Use wax when… you wish to manipulate the target.

Use clay when… wish to create fetches or servitors, when you wish to create permanency.

Use twigs when… you wish to bury or throw the poppet out, when you want the poppet to be easily destroyed by breaking or setting on fire.

Sigils:

Use an alphabet grid or circle when… you wish the sigil to be more random and less attached to you.

Combine the shapes of letters from a sentence… when your sigil is very specific and a short term goal.

Use your own personal symbols when… you want the magic to be connected to you, when it is personal.