In what ways do you reassess and adjust your actions when confronted with the reality that they may not always have the intended effect?

I don't adjust them. I have no idea what the unintended effects are, they're controlled by forces much larger than myself, and I couldn't possibly know what the unintended consequences of an action are. That's not entirely true, because I'm quite capable of considering alternative outcomes from my decisions, but I've found in my own experience, often the real outcome is one I hadn't considered. So, I make my decision as if that's the only thing that really mattered, while simultaneously knowing there's so much more going on that I will have to adjust for as more of reality is shown to me based on my decision. I'm simultaneously uncovering and creating reality with every decision I make.