One possibility is to use the \nocite command with the wildcard character: \nocite{*} which does the same as if you were using \nocite for every entry in your .bib file. Here is a MWE:
\documentclass{article}
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@article{A2013,
author = {Author, A},
title = {A nice paper},
journal = {Journal},
year = {2013},
volume = {1},
pages = {1--2},
}
@article{B2013,
author = {Buthor, B},
title = {A wonderful paper},
journal = {Journal},
year = {2013},
volume = {1},
pages = {3--4},
}
@article{C2013,
author = {Cuthor, C},
title = {An amazing paper},
journal = {Journal},
year = {2013},
volume = {1},
pages = {5--6},
}
\end{filecontents}
\begin{document}
\nocite{*}
\bibliographystyle{plain}
\bibliography{\jobname}
\end{document}
And the output:

If your .bib is too large, there are some packages designed just for this, like the biblist or listbib packages.
For instance, deleting the \nocite{*} line and adding a \usepackage{biblist} in your preamble, you get:
