1) Go to: threadless.com
Browse the T-Shirts and copy 2 shirt designs that you think
are the best.
Create a blog entry which explains what you like about them.
2) Go to https://www.threadless.com/make/submit/
Check out the design challenges and weekly winners. Choose
the challenge theme you would like to enter.
4) Download the design templates here: Create 2 different shirt designs and post them to your portfolio.