1: a good place to start is with the words, incantation, chant, song and so forth. compos the words of power by mentioning the goal of the spell, the spells subject and the powers you wish to invoke to cause that goal to manifest, in whatever order seems to work best for the prose. literary concepts like metaphor, simile, analogy and the like can e very useful for this.
2: next, consider adding movements, hand gestures, dance and body poses to help illustrate and/or reinforce the concept expressed by the incantation. movement and pose can be used to express silently one or more aspect of the incantation if it fits better as an action then a phrase. as mentioned above, the conventions of simile, metaphor and analogy can be useful when finding a way to blend incantation with action.
3: finally, you may want to add an physical object or component to the ritual. usually, these objects are included as props in the action performed along with the incantation, working to further reinforce the symbolism involved, but can also work as recpticals for energy ( charged object), or even be utilized for they’re own spiritual properties (as many crystals are.) pictures, glyphs and images can also be charged with energy and used like other forms of talisman. often, these work well as the drawing of the picture, accompanies with the recitation of words of power and using special inks, can combine all three phases into a cohesive and powerful whole.
in short, write an incantation, come up with a ritual action to help express the incantation, then choose an object or prop to perform the action with. all three phases blending together to form a more powerful working whole.
you can only get as much out of a working as you put into it. some practitioners can invest a huge amount of pure psychic energy and get the desired results, but others find it easier to blend more physical effort into the process to achieve the same effects. this is the point of the above process. not only can it provide a mental focus for the caster, the physical expenditure of energy into the casting of the spell increases its power the same as channeling energy into it through meditative means.