Organizing my thoughts

This is very hard for me to do when I write. I have all of these ideas and thoughts in my mind but I can't put them down on paper. I dont know how to organize all of my thoughts. I like how they give me the idea to free write for ten to fifteen minutes to see what is on my mind and to give me and idea on what exactly it is I want to write about. I would basically do it is steps. First I could free write, then I could put it into categories of some sort, then comes the outline. The outline would be the hardest part for me because thats when I have to be super organized and my thoughts have to be completley settled and I need to know what it is I want to write about.