Vectortuts is a vector tutorial blog that I regularly read and recommend to anyone who wants to find some quality Illustrator tutorials online. Everyone has different techniques, and there's always an opportunity to learn something new to help you be more efficient. The article is called 20 Challenging Illustrator Tutorials on DeviantArt, and my tutorial is listed at #10.
This is the same tutorial that was featured on Dani Jones's blog a while back, when I won second place in her Art and Learning contest.
I will be posting more Illustrator tips and tricks here in the future. If there's anything you've seen in the pages of Green Corner that you'd like to ask about; please do!