1. Read customer testimonials before you buy anything. People are more than happy to complain about bad service online, so search for sites and testimonials which can be terrible so you know what you're getting into. You should take bad reviews with a grain of salt, but if you see many, you know there exists a problem.
2. Online shopping is a wonderful way to save money as you can look around so easily. If you're looking to save as much money as possible, remember to check out any deals that the online store may offer. Most stores offer some from of sale or deal frequently, so that you should be able to find a great deal that may help you save even more money.
3. If you're purchasing clothes or shoes online, be careful using the sizing. Some items typically run smaller or bigger 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.
4. Be wary of any emails you obtain, even if they appear to be from a retailer you trust. Never click on a hyperlink that directs you to a web site other than the main one you shopped on. Should you, you may become vulnerable to a gimmick. Rather than simply clicking on an email hyperlink, just go up to your browser and enter in the web site you want to go to. It really is much safer that way.
5. Be careful when it comes 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.