I felt the bizarre need to organize all my icon tutorials so here's this little post. Hope this helps you find what you're looking for! Just click on the image to get to the tutorial.
[x] Missing link? The tutorial probably hasn't been posted yet--even if it has been written.
[x] Broken link? Tell me and I'll replace it ASAP.
[x] Request a tutorial? Check the CommunityInfo to see how to correctly do so.