1. Pay close attention for potential sales online starting as early as Wednesday. Many brick and mortar stores do sales on the weekends, and to compete, many online stores have moved their sales days up by a couple of days. You can often find exceptional mid-week bargains with just a little online research.
2. Make sure that you're entering your payment details on a safe and secure site. Search for "https://" in the URL of the site that you're attempting 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 with your account information.
3. Be suspicious of overdoing it. It is much easier to overspend when you are shopping online. You start to rationalize that you can spend more money for those shoes because you saved money on gas and the food you would have gotten should you went to the mall, for example. Give yourself a limit and follow it.
4. If you want to buy a used product online, learn more about the vendor first. You need to visit their profile to check out reviews published by other shoppers who bought products out of this seller. Usually do not hesitate to contact the seller to question a few questions concerning the product you are looking at.
5. Be careful in regard to the online stores that you consider buying from. If the web store is poorly designed, packed 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 safer to be safe than sorry.