If you shop using Google's Chrome browser, there's an extension that could give you a better deal on items you're thinking of buying.
Check out WikiBuy.com. It's free, and it automatically compares prices with other sites when you shop online.
For example, a Philips HF3520 Wake-Up Light With Colored Sunrise Simulation is $100 on Amazon, but WikiBuy automatically found the same exact item for $92 dollars.
It's only and eight percent discount, but it could offset the price of shipping for most items.