Are you just getting started with writing an abstract? The American College of Physicians maintains the Guide to Preparing for the Abstract Competition which covers writing a research abstract, clinical vignette, poster presentation, and other presentation tips to assist you in communicating your research results.
Everyone appreciates research that is original, rigorous and reproducible, and that is methodically presented and well-written. To that aim, see the reporting guidelines listed on the EQUATOR network site. The site also includes a Toolkit on Writing research, & How to write a great research paper using reporting guidelines.
For more help and further consideration of the writing process. See also: