Have you ever...
...given someone, who wants to know how to get better at designing for Threadless (or better at creating anything, really) advice along these lines: "Just do it everyday." Maybe you included an extra line like, "it doesn't matter if you think that it sucks. What's important is that you keep doing it."
Did you give this advice online? Do you have a link to it? Do you have a link to your portfolio? Do you want to be included in a sweet blog post on my coming-soon blog? You'll get some eyes on your portfolio, if you want me to include a link to it, that is. You can also be anonymous.
Advice given before this post was made is preferable.