Thanks for all the awesome feedback guys! Having you guys comment really makes this forum as valuable as it is.
I have changed the title to tuning rather that trimming as the terminology should be correct :)
As to most of the other things, I think they should be covered in the rigging of the sail (which I covered here
howtowindsurf101.com/rig-windsurf-sail/ a while back). I guess it is tricky to say where the correct rigging ends and tuning starts.
I will also include the fact that the downhaul should be changed first and only then the outhaul.
I tried to keep this article as simple as I could get away with as the idea is to give newbies some actionable advice without information overload.
The pronunciation of my name depends of who says it :P Árne (with the rolling "r") from my Spanish friends, my German family calls me Ahne, and in my English school it was always Arnie. I will respond to any hehehe.
Again, thanks for the feedback guys!