Stay one car length behind for every ten miles per hour your are traveling. For example, if you are traveling 60 mph, keep about six car lengths between you and the car in front of you. Turn on the windshield wipers and headlights. Use washer fluid to clean any film or scum from your windows. Watch for flooded areas, such as bridge underpasses.
Water can splash on the engine and cause it to stall.
If you must drive through deep water, slow down to reduce the chances of getting the engine wet. Any time you have driven through deep water, make sure you check your brakes. Apply the brakes lightly several times to dry them out and make sure they are working properly. Also make sure your tires are properly inflated. You never know when you might be stranded.