More than you asked but sometimes clearing the mind before trying to create with it can help, I’m a devotee of the “Getting Things Done” system (“if you think it, ink it” - never carry lists and to-do’s in your mind, get them into a planning system) and I find it helps.
"By names and images, are all powers are awakened and re-awakened."
This hints at use of vibration, and god forms, with imagination as the key. Why each spirit has a name and a description of appearance and forms. I tend to think about what those forms are in symbolic terms and powers.