When you have completed each chapter you need to compile the dissertation and this may take one week or more. Unfortunately if you have left everything to the last minute you may find that there is no time for this! However, it is surprising how much easier a dissertation can be to read if you have found the time to do the following:
1) Introduced each chapter with one or two sentences explaining its purpose and why it logically follows on from the previous chapter, do not just re-iterate the contents page.
2) Finish each chapter with a summary of the key points and logically link it to the next chapter
3) Edit the document to avoid repetition of material and ensure there is a logical flow and clear structure.