Drilling in WoodMake the job easier and prevent splitting the wood. Drill a pilot hole, and apply liquid soap to the screw. The screw will go in as 'greased' and the soap will dry to help prevent it from coming loose in the future (a drop or two on the screw is sufficient).
Building Corner ShelvesThis is a page about building corner shelves. Sometimes the best or only location for some shelves is in a corner.