I write spells as tools, like a tinderbox or a shovel. They give players access to more approaches and effects that can't be accessed through mundane fantasy technology. I prefer specific gameable effects to magic words systems; having constraints on the effects the spells can produce lets players use them in more creative ways that I can adjudicate faster than abilities that work directly on the narrative. Similarly, I want everyone to have access to magic, because it makes up so much of the system's content (a whole page!). So that's what I've done - no longer is casting the exclusive provence of the casting classes; they're part of everyone's toolbox. Of course, this doesn't make it easy - or safe.