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Chances are your adviser has already supervised one or more theses. Take advantage of his or her experience! Send him drafts of the chapters of your thesis before submitting the final thesis. Of course, the drafts should be as good as possible from your point of view. Your adviser can only improve your drafts so much. If your draft is of low quality, (s)he can help you push it to an okay-ish level; but if the draft is already of high-quality to start with, (s)he can help you achieve an excellent resultelevate it to pure awesomeness. Note that your drafts need not be complete yet: you can always hand in missing bits and pieces later on. Here's a schedule that has proven to work well regarding when to hand in what.
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