1. Be sure that you're entering your payment details on a good site. Search for "https://" in the URL of the site that you're trying to buy something from. If you don't see that or no indication of any website security, then it's probably a great idea not to trust those people with your account information.
2. If you find a great product on the favorite site, search for it in a search engine before you buy it. Make note of the model number or brand, and do a quick search to successfully can't get it cheaper from somewhere else. You might be able to save a few dollars like that.
3. If you want to buy a used product online, learn more about the vendor first. You should visit their profile and look for reviews written by other shoppers who bought products from this seller. Do not hesitate to contact the seller to question a few questions about the product you are considering.
4. If you're making an online purchase, don't hesitate to contact customer service if you have a question. By contacting customer service before making your order, you'll discover how helpful customer care is and exactly how quickly they respond. This is useful information to have when something goes completely wrong after you've made your purchase.
5. If you are going to be doing some online shopping, make sure you be aware of the liability for each credit card you utilize online. Many credit cards have automatic fraud prevention built-in while others offer it to get a minimal fee. You do not want to get stuck with purchases made on your card when the number is stolen.