08/21/11 EDIT: WOW. I wasn't expecting a DD for this. Especially since I was on vacation when it happened (Which meant I couldn't respond to everyone in time. Sorry!), but THANK YOU. This is awesome!
Now, set yourself a challenge and get to it! DON'T GIVE UP!
Long story short, I wanted to get better at drawing digitally. So I set myself a challenge, and posted a different picture of an Adventure Time character every day for the month of June to my Tumblr - [link]
And this is the result!
Each picture was 600x1050 pixels, and the final piece is 12"x21" at 300 dpi. Wow.
I'm just happy with the way I improved over the month, and I've still got a lot to learn. At least now I've got this nice souvenir to look at when I hit any rough patches.
Hope you enjoy it, too!