If you have the Amazon Prime Store Card or the Amazon Store Card, you may be wondering just how to find the expiration date, or how to add it to your Amazon account as a payment option. You also may be wondering just how to make a payment, because you don’t do it through Amazon. Here’s how to do all of these things.

Have you had a vendor get preauthorized to withdraw funds from your Paypal account, and now you want to cancel that authorization? Here’s how.

This week Amazon opened its second 4 Star by Amazon store (the first is in New York City) at the Park Meadows shopping center in Lone Tree, Colorado, a suburb of Denver. It’s interesting to note that Denver got its Amazon 4 Star store even before tony Berkeley, California, which is slated for the third 4 Star store in the near future. (List of Amazon 4-Star store locations below.)

This is quick little tutorial on how to search online for apps in the iTunes store, using your browser. You’d think it would be obvious as to how to search the iTunes store online, but Apple does not make it easy. In fact, the ‘search’ functon on the Apple site doesn’t help at all.

Amazon has announced that it will be building a series of physical, brick-and-mortar convenience stores. The new Amazon grocery stores will be competing with your corner store and gas station convenience store for your purchases of perishables such as milk, meat, eggs, and produce. Amazon also plans a series of drive-up convenience stores, so that you can order food and other products online, and then have same-day delivery curbside to your car.

Ever look at a charge on your credit or debit card statement and wonder “who the heck is that?” We recently became aware of a lot of people finding a charge from “SEI” on their online statement who have no idea what SEI is, who SEI is, or what SEI stands for. They understandably want to know “What is this charge?” So we decided to write up this simply explanation of merchant names on credit card statements, using the cryptic “SEI” as an example.

“How did this store get my email address to send me a Square receipt?” asks a reader. “I paid for something at a new store that had the Square iPad checkout thing. I never gave the store my email address, but within seconds I had an emailed receipt. How the heck did Square get my email address?” laments another. Here’s how.