[he11ow]

It's not "bad" if you don't, it's just better if you do.

For one thing, you forget. For another, if you're only recalling stuff you've done in stressful situations (ahead of looking for new jobs), you're doing a disservice to yourself.

I'm guessing, from your referencing of college, that you've been working just enough years for that reference point to still be fresh. But after a while, it's less about "tasks completed" and more about "what sort of value do you add?".

Tracking your accomplishments helps crystallize this, to yourself first, and then to others, as you pick and choose to set yourself down the path you want to carve out.