1. Always save copies of your orders and receipts from online purchases. Many stores will redirect one to a page after you've submitted a purchase detailing anything that was bought, customer information, the prices, etc. You should either print a copy of this or save a copy to your computer in case any issues arise before the end of the return period. Make sure to save any emails about your items' status or correspondence with the company regarding your orders, too.
2. Be wary of overdoing it. It is much easier to overspend when you find yourself shopping online. You start out to rationalize that you can spend more money for those shoes because you saved money on gas and the food you would have gotten if you went to the mall, as an example. Give yourself a limit and stay with it.
3. If you're making an online purchase, don't hesitate to contact customer service if you have a question. By contacting customer service prior to making your order, you'll learn how helpful customer care is and exactly how quickly they respond. This really is useful information to have in the event that something fails after you've made your purchase.
4. When you're shopping online you should be sure that you know who you're buying from. If you're buying on an online auction site, only buy from people that have positive feedback. On other sites look to see when they are a reputable company by trying to find reviews on them online.
5. Before going shopping at any online retailer, do a quick search for promotional codes. Lots of the big retailers often have promotions running that are not advertised on their own home page. Doing a quick search for these codes will allow you to insert the code at checkout to save money.