1. If you want to buy books online, you'll get a better deal if you get them used. Based on the condition you obtain them in, you may just end up paying a few cents plus shipping. Make sure you go through the description of the book to see if you will find any damages you should be aware of.
2. If you find a fantastic product on your 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 ensure that you can't have it cheaper from somewhere else. You might be able to save a few dollars like that.
3. When shopping online, always try to keep in mind the cost of shipping. Many sites offer free shipping on purchases over a certain amount. In the event that you have to pay shipping, make sure that it is going to fit into your budget after you've added everything in your cart. Using a full cart only to find out you are unable to afford the shipping is never a fun experience.
4. Be wary for any emails you obtain, even if they appear to be from the retailer you trust. Never click on a link that directs you to a website other than the main one you shopped on. If you do, you may become vulnerable to a scam. Rather than simply clicking on an email hyperlink, just go up to your browser and type in the web site you need to go to. It is much safer that way.