Eclipse to find any resource of a project

Every time, I've to work on a new project, I spend lots of time to understand the structure of the projects and the location of the files.

Eclipse is a tremendous help for that: on my new project (thousands of JSP/XML files, dozens of CVS modules), when I use the web applications and I want the source of a given jsp, I use Eclipe Navigate -> Open Resource... (Shift+Ctrl+R) to locate the files corresponding to a given regexp (e.g. *Summary.jsp).

It's also a good shorcut to know when you have to work on big projects where browsing the project hierarchy is just too slow (and requires way too many clicks!).