Make a list of everyone who contributed to your manuscript who does not fall under the category of authorship. Include people who helped with technical aspects of the manuscript, writing or gave general support to your project. List each person's degrees and affiliations, and whether he received compensation for his contribution.
Identify the person or entity that paid for any writing assistance.
Include information on the data that you used in your manuscript, any possible conflicts of interest (such as relationships, affiliations or financial interests), your sources of monetary support, the roles that any sponsors played in the creation of your manuscript, critical disclaimers and supplementary material.
Turn your list of contributors and information into clear sentences and paragraphs that follow a logical order.
Get written consent for the inclusion of any names in your acknowledgements section.
Place your acknowledgements section near the end of your manuscript. Put the section after the bulk of your manuscript (in a scholarly manuscript, after the results, discussion and experimental sections) but before your references, notes and figures and captions sections.