Washing your car windows with shaving cream will keep them from getting condensation.

And as with everything else in life, take care of problems or maintenance in your car early. Time to change your breaks? 50 USD Waiting until your break router has a gouge? 3000 USD

And I've just recently discovered that going into the same maintenance shop routinely usually gives you a discount. Our second oil change right at three months was half off the first one.