Thoughts on paper

Typically when I begin to write I sort of get together a few ideas in my head, I wouldn't necessarily call it an outline because there's no clear direction I want to go in other than what the introduction will be, the end for me comes about halfway through the actual writing. As I write i start with the most logical introduction to whatever I'll be writing about and put that down. Once i feel that there is a solid foundation to base the rest of my writing on i will move on from there and take my thoughts and write them down as i go along. Because of this though about halfway through i tend to stop writing and read what I've put down as a whole so that i can reorganize my thoughts again and continue towards the end of the writing. Usually by this time however the ending is pretty clear to me and the rest of what i write will actually support my end paragraph. Its funny because when i break down my writing style i start with a solid idea to base the writing piece on then move towards the end without actually knowing what I want the end to be, only when I get to a certain point do i create the necessary paragraphs and supporting ideas to build up towards my ending which usually ties in well with the introduction.