Problem: Your bookcases are buckling under their heavy load.

Enter: The carpenter. A professional knows exactly what to do, from choosing the right veneer to finding the proper wall studs that will prevent it all from crashing down.
Cost: Varies considerably. Count on spending at least a few hundred dollars for multilevel shelves.
To Find One: Ask friends and neighbors for referrals, or contact your local building association at the National Association of Home Builders’ website (www.nahb.org).
Consider Doing It Yourself When: You relish the chance to act as a handyman and break out your power drill. Find a kit with instructions and hardware at a home-improvement or hardware store.