I think I read it here in one of the forums, I think it would be important enough to make a new post for it. It sounds very simple, but it can help your dps stay where it should be. If you have noticed you will sometimes start casting a fraction of a second later than when you click it, this addon (Quartz Can be found here) will bring up a casting bar telling you when you can stop casting to make up for the extra time lost.
The macro is very simple:
/stopcasting
/cast <insert spell here>
It can increase your dps (from where you are), by a decent amount, letting you get to the potential dps that you can/should have.
Is the link to the Oboards post
I know this may be old information for some of the veterans here, but I figure any help in increasing dps can help, right?!
<edit, changed the title>
Edited, Aug 10th 2007 9:53am by Anobix