Mike Beltzner has made an excellent video on how to use Bugzilla Quicksearch. If you use Bugzilla for more than about ten minutes every day, then this is definitely worth 5 minutes 33 seconds of your time.
Sadly, free WordPress doesn’t seem to allow the <video> tag, so you’ll have to go to all the effort of clicking this link (Theora video).
My favourite part is right at the beginning, where Beltzner says breezily “OK! So, now I’m going to change your life!”, and in the background you can just hear Madhava’s entirely unimpressed “I see.”
[Historical correction: as Jesse has pointed out, although he was a great supporter and inspirer, Andreas Franke made Quicksearch, not him.]