Ask HN: Helpful methods for debugging JavaScript / websites?

I find that when I'm coding in Javascript (usually client side), most of my time is spent debugging. It's not something I hear discussed too often, but every time I find some new method for debugging better, my productivity improves a ton. For example, something as simple as right clicking on a function to get its definition has saved me lots of time.

Still, I feel like my way of debugging is pretty ad-hoc and inefficient (perhaps others feel the same?). Was wondering if anyone had any tips / hacks / suggestions for debugging more efficiently.