Messages bundle best practices

Hello, there

I have this JSF application, using Facelets and Tomahawk with several documents which are making a significant amount of properties created into the messages bundle properties file.

I know there are some possibilities available like to distribute the properties into several property files or using naming conventions for the properties but I want to know what are the main guide lines to follow or some patterns I can use, in order to use these implementations with much more effectiveness, I mean, in this particular case, what are the best practices to follow or tools available in order to properly handle this amount of details in the resource bundle?

Thanks in advance