I recently posted on the fear of over-praising employees, referencing a Business Week column on the topic by Liz Ryan. One of the biggest reasons behind the fear of over-praising employees, according to Ryan - and I think she's right - is the expectation that praise will lead automatically to a request for a pay increase.
Using that fear as a stepping off point for a bit of career advice, the Career Encourager has written a great post, targeted to employees, on Asking For a Raise.
Because I tend to approach compensation questions from the management perspective, I always find it interesting and enlightening to see the same questions explored from the other side of the table, as is done so nicely in this post. Check it out!