If you are a club member most addons give you extra filters that your can use in addition you can use the filters that come with JEvents itself - i.e. category and search.

The easiest way to know what you can use on your site is to look in the folder plugins/jevents/filters/.  In this folder you will see files like Locationsearch.php, Taglookup.php, Locationcategory.php, Customfield.php etc.  The more addons you have the more filters are available.  NB in Joomla 1.7 you will need to look for all sub folders that match this pattern  plugins/jevents/*/filters/

In most instances the names should explain what the filter does - to use them you take the name of the file drop the ".php" and change the name to lower case (don't touch the actual  files - this is just how you find the correct string to use in the filter.) .  So Locationsearch.php becomes locationsearch and allows you to do a search on locations (which includes location name and city) etc.

To add your filters to the module add them as a comma separates list in the module paramaters e.g. "search, category, locationsearch".