Reference librarians are happy to help with cite checking and source collecting. Reference librarians are usually on duty Monday - Thursday, 9am - 8pm, Friday 9am - 5pm, and Sunday, noon - 8pm.
Often journal staff have only a certain portion of the footnotes, but are trying to check a source previously cited (e.g. "Supra note 2, at 233"). In some cases they do not have the reference for footnote 2, or if they do, the person who is cite checking footnote 2 has the book off the shelf. Often a footnote needs to be seen in the context of the entire article before we can determine what is being referred to.The reference librarians can therefore better assist you if they can view a copy of the entire article being cite checked.
If possible, group cite checking tasks by the sources you need to check, rather than by footnote number. As noted above, you may have several footnotes that refer to the same source.
Sometimes it can be difficult to determine exactly what your source is (book, report, hearing, treaty, etc.). Check the Bluebook Tables and Index for help. Check the Bieber Dictionary of Legal Abbreviations for help with abbreviations.
If you are unsure how to cite to a source, check to see if it has been cited before in a well respected law review. Use other attempts at citing only as a guide; always consult the Bluebook.