I also have noticed that there are bigger multiple colored pens available at art shops. I think they have 20 different colors in them. They are very wide in diameter.
I might get one of these as well.
I just want to say I love mind maps! At the end of semester, it makes studying for finals so much easier.
I am one of the most disorganized people in the world, and actively redressing my challenges. Mind maps is a good start.