What are the important guidelines that an author must know before writing a research paper?
Thanks for your question. Each journal usually has a formal guide to authors that you can find on its website. These typically contain instructions on submitting and presenting your data, how to format your paper, certain checklists that you may have to provide, policies you have to follow... As an example, Nature's guidelines can be found here: https://www.nature.com/nature/for-authors. Apart from such formal guidelines, I would say that there are general recommendations about presenting your research that apply when writing a research paper. My main recommendation would be to keep in mind who your audience is: a fellow specialist, or a set of scientists with different backgrounds? Depending on the answer to that, you have to provide more or less general context in your paper; this will be perhaps most important when writing the title of your paper, the abstract and the introduction. Always ask yourself whether the type of reader you have in mind (and this of course depends on the journal you will be submitting your work to) would be able to follow your story, and whether he/she would be able to understand what research problem you addressed, why you did that and how you approached it.