The best time for using coupons is when the store is offering items for sale
. Let's suppose that the normal cost of a shirt is $50 and you have a $5 off $30 or more coupon, then it would cost you $45. That's not a huge difference! But if that particular shirt is on sale for $30 and you apply the same coupon on it, then you spend just $25 (that's half its original price). This is much better savings than the previous one. So, you should try to find the best deals and stack coupons for maximum discounts. But remember, some coupons have exclusions for some brands, categories or on-sale items.