Amazon Payments

How He Earned 4 Million Airline Miles by Buying Dollar Coins

Rewards cards can be a great way to earn free cash -- if you use them correctly. Brad Wilson, founder of deal site BradsDeals, took that idea to its logical extreme, raking in millions of points for free, and now he's sharing his techniques with us.

Your Smartphone as Your Wallet: 3 Companies That Will Cash In

The smartphone revolution is well under way, and its latest advances could eventually let it replace your wallet. But the adoption of these new technologies can do more than reshape how you pay for purchases -- it can also pay off for your portfolio.