KNOWN and NEW information structure in English
This is a VERY important concept that can dramatically improve the flow and readability of your writing.
http://www.lc.unsw.edu.au/thesis/old_new.html
http://www.lc.unsw.edu.au/case_study/3g.htm
How to Improve the Flow of Your Writing
STRUCTURE and STYLE
Transitions between sentences
http://www.hanyangowl.org/media/connectingideas/connectingideas.pdf
How to structure information in English sentences
http://www.hanyangowl.org/media/connectingideas/giventonewinformation.pdf
How to change the structure of sentences to better communicate your meaning.
http://www.phon.ucl.ac.uk/home/dick/tta/sentstruc/sentstruc.htm#special
A guide to making your writing flow
http://www.hanyangowl.org/media/connectingideas/makeyourwritingflow.pdf
Paragraph structure
http://www.hanyangowl.org/media/connectingideas/paragraphstructure.pdf
Sentence length and variety
http://www.hanyangowl.org/media/connectingideas/sentencelengthandvariety.pdf
Types of paragraph structures
Overview of important information structures in research writing
http://www.io.com/~hcexres/textbook/structov.html
Classification
http://www.io.com/~hcexres/textbook/class.html