The grading of your residential lot will prevent wet basement issues for you if you slope the land away from your basement foundation. Over time the land settles and shifts and usually toward that big hole in the ground that you have dug to build your house on!
Your land should slope away from the house for about 8 feet.
Check to see if you have a backflow prevention valve on your sewer line.
Clean the eavestrough regularly.
Downspouts should be about 6 feet long, in the down position to drain the water away from the foundation.
Keep debris out of window wells.
These helpful tips are compliments of Canadian Residential Inspection Services Ltd. Thank you, Dario Bonin.