Inspired by the recent question on list of figureslist of figures: what is the point of ending your introduction with a paragraph saying "The paper is structured as follows: in Section 1 we do BLAH, then in Section 2 we do BLAH, we move on with BLAH in Section 3, and conclude with Section 4 in which we do BLAH"?
Many papers in my area do it, my coauthors add them to our papers, and I kinda took the habit, too, but I never really understood why. It looks like a poor man's table of contents. After all, we already write what we plan to do in the introduction, and remind the reader in the conclusions.