1. Ensure that you're entering your payment details on a safe and secure site. Look for "https://" in the URL of the site that you're seeking to buy something from. If you don't see that or no sign of any website security, then it's probably a good idea not to trust those people together with your account information.
2. While shopping online, it is essential that you spend a little time looking into the site that you will be considering buying from. You can find information about the web page from other sites and the Better Business Bureau. Not researching them might lead to you having the products you did not order or getting billed greater than you should have.
3. Many online shopping sites offer discounts if you use a "discount code". These codes are easily found online simply by entering the words "coupon code" along with the manufacturer or name of the website you will be buying from. They could offer a percentage off or free shipping by simply entering within a simple code which can be easily found by investing a few minutes trying to find it.
4. Make sure to read all the information about any product you are considering purchasing. Just looking with a picture online can be deceiving sometimes. It will make a product look bigger or smaller than. Make sure to look at the description so that you know exactly what you really are purchasing.