Why Stack Traces Feel Worse Than They Are
A stack trace shows up exactly when you're least in the mood to read fifty lines of framework internals, so the instinct is to scroll past all of it looking for something that looks like your own code. That instinct is actually correct, it's just usually done in a panic instead of on purpose. A stack trace is a literal call history: every function that was running when things broke, in order, oldest at the bottom, newest at the top. Reading it well is less about understanding all of it and more about knowing which lines to skip.
Read Top to Bottom, But Stop Early
The top line is where the error was actually thrown, the exact function and line number. That's almost always the first thing worth reading closely. Below it, each line is "and this called that, and this called that," walking back through the chain of function calls that led there. You rarely need to read the whole chain, you need the top line and then the first line or two that mentions a file from your own project, not a library's.
Separate Your Code From Everything Else
Most stack traces are mostly noise: framework internals, standard library calls, dependency code you didn't write and can't fix directly. Scan for the first line that references a file path inside your own project, that's usually where the actual bug lives, even if the error technically originated somewhere deeper in a library. A library rarely just breaks on its own, it's almost always reacting to something your code handed it.
The Error Message Is Doing More Work Than You Think
"Cannot read property 'x' of undefined" isn't cryptic once you slow down: something you expected to be an object is actually undefined, and you tried to reach into it anyway. Most error messages are already telling you what's wrong in plain language, the difficulty is usually just skimming past it too fast because the surrounding stack trace looks intimidating. Read the message itself before the trace, it often narrows the search by itself.
Reproduce Before You Theorize
It's tempting to stare at a trace and guess at a fix based on a hunch. Resist that until you can reliably make the error happen again, on purpose, in a small case. A bug you can reproduce in three steps is a bug you can actually verify you've fixed. A bug you're guessing at from a single trace is a bug you'll "fix" and see resurface in a week.
Building The Habit
Next time a trace shows up, don't scroll frantically. Read the message, find the top line, then scan down for the first line that's actually yours. Most stack traces are shorter than they look once you know which two or three lines are worth your attention. The rest is context you can skip on the way to the fix.