Caching Results

[msftblows]

I have some queries that are run numerous times a day..is it better to cache 
results such that I would run a filter once and then cache it, and with the 
Term clause run the query? Is it better for me to instead look into optimizing 
my code and query?
 
I am trying to get some thoughts on caching in general with Lucene.
 
Thanks!
-Joe