1. Be careful in regard to the online stores that you consider buying from. If the online 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.
2. If a website is not secure, do not make a purchase. Simply look up at the web address when you are shopping. If you notice an "https" as opposed to an "http," you can feel confident enough to insert your credit card information. However, if there is no "s" in the address, start working on a different site to be around the safe side.
3. Many online shopping sites offer discounts if you use a "promotion code". These codes are often 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 simply by entering within a simple code which can be easily found by investing a few minutes trying to find it.
4. If you want to buy books online, you'll get a better deal if you get them used. Depending on the condition you get them in, you may just end up paying a few cents plus shipping. Make sure you read the description of the book to see if there are any damages you should be aware of.
5. Sign up for the website's newsletter if they have one. Many times stores will give you a reduction or some type of deal when you sign up for their newsletter. Determine if there is a deal associated with signing up for the newsletter at any store you need to shop at.