There are three types of catalyst that I shall cover. They bring their energy to a spell or ritual. The three are: Herbs, Flowers and Stones. As you should know, there are four physical elements: Air, Water, Fire and Earth. You can combine herbs with water, air, earth, and so on. Here is the guide:
Air = Dreams (place herb under your pillow, ask for revealing dream)
Fire = Bonfire (burn herbs while you speak your bidding and hold it in your mind)
Water = Bathroom (toss herbs in the bath, and lie in it, visualising the wish coming true)
Earth = Nature (Take herb sit under a tree and drink an infusion of it, or plant a seed, and as it grows, so does your wish)
Air = Visualization (visualizethe flower becoming larger and encompassing you)
Fire = Sun (wear the flower's essence and the sun exalt its purfume while you express your wish)
Water = Seaside (toss the flower in the sea, or moving water, speaking your wish)
Earth = Routine Actions (Fill the place you are most often with the required flower)
Air = Spell (write the spell on parchment and place it and the stone in a spellbox)
Fire = Candle (lay the stone near a candle and leave it there until the candle is extingiushed.
Water = Well (Rinse yourself with well-water in which the stone has been lying in for three hours)
Earth = Keeping (keep the stone on your body, in a pouch, for the required time)