It’s hard to put into words, but the most important ingredient is confidence. Seeking wisdom is a wonderful thing to do, but when it’s time to cast a spell, be the master. Do what seems right and know deeply that your intuition is correct.
Personally, I am usually very agreeable. Some would even call me submissive. I try to keep my spiritual conversation very open and philosophical. When I’m casting, that goes out the window.
I find my inner wizard. I adopt a calm but aggressive persona and often speak in a forceful British accent and dialect. My movements become sharp and flourished. I never let another entity pull rank on me in that state. If I run across Lucifer or Odin, I become one with them and keep moving forward.
There are lots of magical operations and rituals that require humility, but to “cast a spell” is to subjugate reality. Be the boss.