Thoughts
One of the things about being "good" (read: experienced) at programming is that I tend to favor debugging techniques that leave as little
room for error as possible. If I have a line of code that doesn't work, my style generally is not to look at it or think about it or even "rubber-duck" at this point. I tend to jump immediately to assuming nothing and either wildly printing variables or binary-searching between the present and a previous working state.