So i've been going through the net for useful tutorials. Actually, i've been doing that for about 2 years now that's why i learn how to go my way around Blender.
Here are some useful tutorials you might want to check out:
1.) Multi-layered SSS
-In my blog, i mentioned that i was looking for this tutorial. This is an awesome tutorial if you want to achieve a realistic feel of skin. This is definitely a must read.
2.) MakeHuman to Blender tutorial part 1 of 3 series
-This is part 1 of 3 of the tutorial series. This series was one of the tutorials i often came back to on the net when i was still learning my way through Blender and MakeHuman.
3.) MakeHuman to Blender tutorial part 2 of 3 series
4.) MakeHuman to Blender tutorial part 3 of 3 series
5.) super3boy's Youtube page
-This kid knows how to use Blender like a pro. When i was just starting with Blender, his Youtube channel was one of the channels in my subscriptions list.
6.) Blender.org Tutorials page
-Of course, to be the best, you have to start from the basics. Tutorials you'll find here aren't even "all" basics. It has intermediate and advanced tutorials too.
7.) Texture Nodes Iris tutorial
-This tutorial is useful when you wanna achieve a realistic look on your model's eye.