Allowing the essay "to flow"

I have talked about the concept of allowing an essay to "flow", but what do I actually mean by this concept? 

It is a concept that all great essays share, and it is about the essay moving logically from one step to the next. That your essay makes sense overall as you have moved from one point to the next. This is not easy to do, especially if you have a habit of moving off topic and rambling on.  

To ensure your essay flows there are a few techniques that you can use. Titles, heading and subheading help give the structure to the essay, so as you write you are not tempted to go too far off topic. But these alone will not ensure a good essay "flow". In your planning, you should make sure your heading and subheading fit together and move logically from one another. Using mind maps can help you organise logical connections between ideas, but prioritising important ideas within mind maps can be more useful. Another idea can be placing your heading and subheadings on post it notes and rearranging these until you have a logical order. 

Please feel free to comment if you have any other suggestions to ensure good essay "flow".