When it comes to making online purchases, it is always important to stay updated on the latest promos and discounts if you want to be able to cut costs whenever you shop. Sign up for newsletters of your favorite online retailers so that you can receive updates on their deals and promos. Musicians friend and other major retailers email their loyal subscribers coupon codes that will give them additional discount on their next purchases. You can also plan for your future purchases since you will receive news on upcoming sales straight from your favorite online retailers.