I've just finished reading a very worthwhile post about how to Increase productivity while working from home. The tips and ideas this post has should really be implemented by all of us who are currently working from home in some capacity, even if it's only part time right now.
This author also points you to other blog articles that are very helpful in this endeavor. I suggest you go read this and other articles on this blog. I know they'll help me, and I think they'll help you, too.