I started doing ATC recently (Artist Trading Cards). For those who don't know, these tiny cards (2.5x3.5) are eagerly traded and collected amongst some artists. I really enjoy them, they're a great way for me to practice various traditional materials without feeling like I'm wasting materials. I have even been doing some exchanges. Once I'm more used to the format, I might even make a few originals for sale.
Here is my personal favorite so far:
It's a watercolor Anders, from DragonAge II 2.5"x3.5"
Anyway, if any of my visitors is interested leave me a message or an e-mail, maybe we could do a trade :)