Coupons & Discounts
It is fairly easy to find Disneyland coupons & discounts as Disney themselves often offers discounts or package deals. These deals improve during off season, which is anytime during the school season, except holidays. Around the holidays of Thanksgiving and Christmas, Disneyland usually does not have very many deals and are more crowded. Go to their official website listed above to see current any specials.
Disneyland and Disney California Adventure are included in the CityPASS. If you don't have one, you can get one here.
Getting a package deal through Disney may save you money, depending on the quality of hotel you want and if it is during the slow season.