Studio Arcanis

I have recently gotten into magick. I much prefer the idea of making my own spells as opposed to using the spells of others. When I make spells, I usually start by finding the corresponding candles, incense, herbs, and deities. I however feel like I am missing something. I always feel like divination, and evocation is more controllable. I feel like I can see results with more accuracy.Is there a way to make the spell making process more effective? Do you guys have any ideas? Is the spell making process more than just utilizing the law of attraction and knowing what materials correspond to what, or is there more to it.