Everyone needs some kind of resume, some way of saying "hey, this is what I do."
Hopefully, it also says "this is what I'm good at," too.
I think every writer should have a "here's everything I've published so far" list handy and available, preferably online. I started putting my own together a while back.
I was pretty surprised, actually...I mean, an article here, a guest blog post there...throw in a couple of fanfiction stories...and my Writer's Resume is actually more extensive than I would have thought.
So, besides having a place where you can tell people to go (no, not like that), you could also consider it an ego-boost--a reminder that, even when you feel like you're not making much progress, you just might be making more than you think.
This is what I've done so far.