Take all the pieces down to a single thought, by express in a single sentence, and rebuild it from the beginning. When in doubt, break the pieces down and rebuild it from its primary components. The biggest trick is structure diffusion, rather than trying communicating one thing well, it will end up saying lots of things badly. Good structure it requires a clear idea of what you are writing, how you are doing it and why.
Set all the piece aside and try to make as final point in a single sentence. It should not be use of compound sentences, try to keep it simple and limit it to a single direct thought. If that is not the idea you wish to write, then what it mean is you do not have a clear enough points of what it is you're trying to approach. In order to write a good structure of essay it must reorganize the piece and split up into several separate ones. Structure is to inform