Avoid driving on rough roads
Keep the windshield temperature stable
Use the defroster on low
Avoid sudden hot or cold air on the glass
Do not wash the car with very hot or very cold water
Apply clear tape over the crack to keep dirt out
Keep pressure off the damaged area
Do not slam doors
Do not hit potholes or speed bumps hard
Get the crack repaired as soon as possible
Use a windshield repair kit for small cracks
Replace the windshield if the crack is large or spreading quickly