Josh Marshall has a good rule of thumb that I would like to see more bloggers taking up. He calls it the Clinton Test.
"When I come across something fishy from the Bush administration, I try to use what I call the Clinton Test to keep myself honest and steer me right. As I’ve noted before in these pages, the Clinton Test is quite simply, how would I react to situation X if it was Clinton --- someone I supported --- rather than Bush --- someone I oppose. It’s a good rule of thumb because seeing a given action through the prism of someone whose motives you are inclined to view favorably is a good check on unwarranted suspicions."
Of course, some conservatives already have their own version of The Clinton Test as Atrios points out.
"We should compare Partisan Liberal Journalist Josh Marshall's "Clinton Test" with Partisan Conservative Journalist Chris Caldwell's "Clinton Test:"
CALDWELL: Well, yes, one of my colleagues likes to say, "The Golden Rule is that all rumors about the Clintons are true". But I think ...
KURTZ: That's quite a journalistic standard.