1. If you find a great product on your own favorite site, search for it in an internet search engine before you buy it. Make note of the model number or brand, and do a quick search to make sure you can't have it cheaper from somewhere else. You might be able to save a few dollars that way.
2. When searching for a product online, take the time to read reviews. Try finding the same product on different sites to read as numerous reviews as is possible. Reading many reviews will allow you to get a more general concept of whether or not the merchandise you are interested in meets high standards of quality.
3. If you're purchasing clothes or shoes online, be careful with all the sizing. Some items typically run smaller or greater than normal. Some shopping sites will advertise if an item runs true to size. If the site doesn't list anything about sizing, glance at the reviews. In most cases, if the item is running larger or smaller, the reviewers will let you know.
5. Be careful where you submit your credit card information. When you are shopping online, always use secure sites. These are sites that have taken steps to safeguard your valuable information. A secured website will begin with HTTPS as opposed to the standard HTTP. There can also be a locked icon, in both your address or status bar, based on which browser you use.