As an unpublished writer I hesitate giving out writing advice. Still, I consider myself a writing veteran from the sheer amount of words I’ve put on a page/web page (I should really count those up some day… 12 NaNos plus 24 years of journals?) and I can tell you one thing that’s always worked for me.
Change your venue. Go write… somewhere. I have my hot spots – the Union Terrace in Madison, the local Starbucks (though that’s more a lack of small coffee shops than choice), even my couch. Still, I do it different with some common elements. I have my computer and my music. But my scenery changes. I can watch people, I can look at the sky, the trees. Sometimes I take in a lot of caffeine or, today, a couple of beers.
Whatever you do, get a feel for your writing from different angles. It’s the best shot you have at seeing it from someone else’s eyes.