1. Be careful in regards to the online stores that you consider buying from. If the web store is poorly designed, filled with misspellings, and overall fishy, you should take your money elsewhere. These are signs that something might not be right about this store. It's preferable to be safe than sorry.
2. Be wary of the emails you obtain, even if they appear to be from the retailer you trust. Never click on a hyperlink that directs you to a website other than the main one you shopped on. Should you do, you may become vulnerable to a gimmick. Rather than clicking on an email hyperlink, just go up to your browser and enter the web site you would like to go to. It really is much safer that way.
3. Ensure that you're entering your payment details on a secure site. Search for "https://" in the URL in the site that you're seeking to buy something from. If you don't see that or no indication of any website security, then it's probably a good idea not to trust those people together with your account information.
5. Be familiar with the dangers of shopping online together with your mobile device. Although it's convenient for a number of reasons, it does put your personal information at an elevated risk for eavesdropping. Public wi-fi and abbreviated URLs are much easier to get around than conventional computing from home, so save your shopping fix for that safest conditions.