Here's a snippet from Kevin DeYoung's book from last year, Just Do Something: A Liberating Approach to Finding God's Will. I think it pretty well sums up the entire book (though I would still recommend reading all of it).

Simply put, God's will is your growth in Christlikeness. God promises to work all things together for our good that we might be conformed to the image of His Son (Romans 8:28-29). . . . God never assures us of health, success, or ease. But He promises us something even better: He promises to make us loving, pure, and humble like Christ. In short, God's will is that you and I get happy and holy in Jesus.

So go marry someone, provided you're equally yoked and you actually like being with each other. Go get a job, provided it's not wicked. Go live somewhere in something with somebody or nobody. But put aside the passivity and the quest for complete fulfillment and the perfectionism and the preoccupation with the future, and for God's sake start making some decisions in your life. Don't wait for the liver-shiver. If you are seeking first the kingdom of God and His righteousness, you will be in God's will, so just go out and do something. (61)

For those coming to our National Conference, you can hear Kevin DeYoung speak this Friday on "Rethinking 'Missional': Reconciling the Mission of God & the Mission of the Church." See the seminar schedule and exhibit hall floor plan for more information on when and where.