I managed to have a headache with writing all this in English @_@
I hope this will be helpful to you, so you can see how I use Paint Tool SAI and you can gain some tricks (I don't think so but let's see...)
Done especially for two friends of mine who wanted to learn how to use this wonderful program!
Ask me anything, even if I'm not reeally an expert of SAI.
I use it just because it's lines are so SMOOOOOOOOOOOOOOOUTH *___*