Tutorials: What should I teach.

Hi, from the poll at the side I can see people are liking my tutorials. Now this post is not my content but more a question. I have a few ideas but what would you guys like me to do a tutorial on. If you have an idea on something that you struggle with then post and I will try and find a solution then post a tutorial on it. I want this blog to be a two way thing so please, post if yoy have an idea.