When writing, it is important to have a clear idea of what you want to say as well as who your intended audience is. These resources discuss some of the things to keep in mind to make sure you get your point across clearly and concisely.
The Writing Center at UNC at Chapel Hill has a number of short guides available on a wide range of topics about writing
The Health Sciences Writing Centre at the The University of Toronto provides a wide range of information for researchers including writing Abstracts,creating Posters, preparing for an Oral Presentation as well as tips on writing style, verb tense, tone, etc.
Note: To access the full-text on a topic, select either the PDF or HTML link to the right of the topic name in the table of contents.