The Integrated Life helps those in the marketplace understand how their everyday work has spiritual value. Christian Overman has put together a great resource at Worldview Matters that contains a series of questions to help us understand the ways in which our work matters to God:
Another helpful tool developed by Christian is titled Signs That I Have A Well-Developed Theology Of Work. Lots of Scripture-supported truths about work that are well worth reviewing. And I recommend we remind ourselves of these regularly!