This thread in Polycount has a TON of great tutorials. It looks to be mostly for gaming, but they are great to view. If you are needing help with texturing for games or pixel art, this is definitely the place for you. There are also some other great links that will take you to things such as hotkey guides for zbrush and project breakdowns, among other things. If you know about the greatness that is pintrest, this thread will lead you to links of peoples pintrest who have collected great resources. Big thanks to Niuva of polycount who did this. Check out their great collection.
I always find myself at this site whenever I am having some trouble understanding something. He has some great workflows and simple-to-follow tutorials for After Effects, Blender, Cinema 4D, Maya, Mocha, Mudbox, and a few others. He also delves into different renderers such as V-ray and Arnold. So if you have free time look into his site and maybe what you need is in there.
VIS Corbell has a good bit of great tutorials on their website. Most are 3ds Max or Vray based but you could still apply them to other programs. There are many others also that are worth looking at. Check out their website and see what you find. http://viscorbel.com/free-tutorials/
If you want to learn about the character creation workflow in zBrush, then this tutorial is for you. Benjamin Shukrallah does a great job at explaining through these tutorials. I’ve never used blender, but the zbrush part was great. Thanks!
Tutorials for Modeling and Sculpting Blender and Zbrush characters