I know we've linked it before, but one site writers may find helpful is Written? Kitten!, which features a text box and a picture of a kitten. Every hundred words (or whatever number you like), you get a new kitten picture! Even if you have used the site before, one thing you may not know is that it's not just pictures of kittens -- you can customize it. So if you don't like kittens, you can have puppies, or whatever else you want, by changing the word(s) on the end of the URL there. (It searches by Flickr tags, apparently. I don't think there's any Pros, alas, but maybe you'll have better luck than I did.)
So, how's it going?