1. Short-term deals

2. Price tracking

3. Coupon codes

4. Student discounts

5. Price drops on returned goods

6. Trade in old goods for credit

7. Bargains for parents

8. Comparison shop and save

9. Buy apps from the Underground

Here you now have free access to more than $20,000 worth of apps, games and in-app purchases. That includes such titles as Goat Simulator (originally $4.99), DuckTales: Remastered (originally $9.99), OfficeSuite Pro 8 (originally $14.99) and Jetpack Joyride, along with all of its in-app purchases (more than $40).

10. Redeem your book purchases for Kindle editions