10 Rules for Back-to-School Online Shopping

The Slice app on the iPhone and Android phones, links to your email and takes the data from those e-receipts that pop-up in your inbox after making an online purchase and catalogs them conveniently on your smartphone. The app even lets you see when each shipment will arrive, this way you don't have to head to the shipping company's website and enter in multiple tracking numbers.

--By Scott Gamm

Gamm is the founder of the personal finance website HelpSaveMyDollars.com. He has appeared on NBC's TODAY, MSNBC and CNN. Follow Scott on Facebook and Twitter.