Read the author or manuscript submission guidelines carefully for any journal which you are considering. The guidelines will specify:
Eight simple mistakes that can delay peer review (and how to avoid them) (PLOS ONE/Maria Gould)
Image (detail): Darwin Online
A cover letter is your opportunity to explain to an editorial team why they should consider publishing your paper, and will be their first impression of your work.
A cover letter should be no longer than one page, and should:
Many journals require statements that the manuscript is not under consideration elsewhere and has not been published before, and that all co-authors have approved the manuscript and agreed to its submission to the journal. Some journal publishers provide cover letter samples or templates in their guidelines.
Image (detail): Darwin Online
For questions about selecting and evaluating journals, publishing Open Access, or copyright and licensing, contact Scholarly Communication Services: schol-comm@berkeley.edu