The holiday shopping spree continues today with Cyber Monday.

The National Retail Federation says 126.9 million people will be shopping online today. But before you get too click-happy on the deals, consider some online safety tips from Shawn Kardell. He's the user experience director in the Minneapolis office of Digitaria, a digital marketing firm that also builds websites for retailers and health care companies. Also, a regular online shopper.

Deal too good to be true? Website that looks a bit amateur? Stop and think.

"You have to be aware," Kardell said. "You have to trust your company that you're making your payments through. You have to trust the retailer that you're dealing with."

And a little common sense goes a long way. Some of his suggestions:

Update your web browser. New versions of browsers often include fixes for previously discovered security problems. "If you're the type of person who uses your work computer sometimes for online shopping, you may not know exactly what the update policies are," Kardell said. Check and update.

Look for the padlock on the address bar. That little icon indicates the SSL or Secured Socket Layer. You can also identify it if the address includes "https." Without that, don't share personal info, Kardell said: "Just looking for that green padlock icon to know that you're in a safe place is always a good step."

Don't store your financial info on a retail website. Although it's easy and convenient, especially if it's a site you frequently shop, resist. "You have the power to keep it on the site or not," Kardell said. "It's 16 digits and the date and the pin. It's not that tough for a little bit of piece of mind."

Use online payments systems. Companies like PayPal stake their reputation on keeping financial information secure. "They are just securing their mode of payment in a better and a different way," Kardell said.