In the church, there seems to be an idea that "discernment" means "praying and waiting for God's specific, personal direction on every decision in my life" -- see John Eldredge's book, Walking with God for a classic example. But is that the view of Scripture? I think not. Such an understanding of discernment leads to several errors:
1. A separation between Christians who "know God's will," i.e. the super-Christians that God speaks to, and the "ordinary" Christians who seem not to hear from God about stuff like the color of their wallpaper.
2. Using "discernment" to excuse unwise behavior and even sin. I don't know how many times I've heard people say, "Well, I've prayed about it for months and the Lord has told me it was OK," even if "it" was buying a $300,000 house when you're $60,000 in debt, or living with but not sleeping with your fiance, or being slack in disciplining your kids. Those are not areas about which we ought even to pray. The best advice I can give people who encounter this "God told me" business from people is to remember that it's not a trump card. We have a responsibility to one another in the body of Christ, and letting someone off the hook just because they played the "God told me" card is hardly showing love to our brothers.
3. Total paralysis in decision-making, stemming from not using your brain and instead waiting for some sign or feeling to show you that God has given you direction. I strongly believe that for the Christian, the ordinary way of making decisions goes like this: Learn, study, and love God's word. Use the mind that God is sanctifying to make wise decisions. Rinse and repeat. But too many people seem to think that's just not "spiritual" enough. A Christian's life IS spiritual -- it's life IN the Spirit! And it can look very ordinary, but an ordinary life lived faithfully still results in "Well done, good and faithful servant." That's not to say that I don't think God sometimes uses other methods to reveal his will to us -- I certainly do believe that he does! But the ordinary way seems to be knowing God's word and living wisely in accordance with that.