Sometimes I do get a little bogged down by accurately checking facts, but I also think it's the natural cycle of writing and I'm surprisingly not that strict with myself. While in the midst of writing checking a fact or two through Google can vastly improve what I want to say. I think it gives what I'm trying to say life. When it gets tedious and becomes time-consuming, though, I think it's best to just write and take some liberties until. Afterwards, you can check what you need to make the scene work. This only really proves as a major problem to me if you're writing a crime/mystery story.