EDIT: I had a problem with the admin of that web so the links are not working atm, but I'll try to fix them asap, sorry for the inconveniences.
I'm collaborating with Draw Central web and I will be posting some tutorials from time to time. I would be very happy if you take a look at them and share by facebook, twitter, whatever you prefer ^^
If you would like to see a specific tutorial from me, leave a comment below and I will see if I can do it.
Oh, and sorry for my poor english >_< I try my best to simplify the explanations so everyone can understand me.
List of tutorials
Paint Tool SAI learn from the basics Linearting in Paint Tool SAI Vector Layers in Paint Tool SAI
How to colour and various tips (Paint Tool SAI) BASIC chibi tutorial (different styles) How to draw Hair Anime Style Eyes