This guide provides information about citing sources in LaTeX using a .bib file with BibTeX, BibTeX + natbib, BibTeX + biblatex, or biblatex + biber.
A Bib Your TeX workshop is offered every semester.
Especially if you're using only a .bib database, you don't want those long hours spent creating and managing your citations to disappear. Here's a list of tools you can use to make something this bad less likely to happen.
These guides are broken into general resources, followed by resources specifically for BibTeX, natbib, and biblatex + biber.
Here are links to some software that will be helpful to you when working in LaTeX. While you can run LaTeX from the command line, many text editors also exist.