Inspect the drip edge and gutters. This is were many leaks will occur. Repair or replace gutters when needed. Gutter leaks lead to problems from water getting inside your house at the foundation. Periodically clear the gutters of debris with a trowel, working away from the downspouts.
Debris causes moisture to build up which corrodes the metal and rots wood.
Flush the gutters with a garden hose. Notice if there are pools of water accumulating in the gutters. This indicates sagging and should be repaired. Caulk any leaky joints. Butyl caulk is recommended due to its excellent adhesion and resistance to moisture.