Learning as much as possible about the website you buy from is going to be of the utmost importance. Before you decide to buy from a specific site, you might want to think about browsing around and see what your options are. You will never want to to decide on a certain website before you take the time to look around and see what all is out there. If you are on a really tight budget and trying to save money, then maybe you will want to consider shopping on an auction website like Ebay. There are all kinds of sites in place for people who want to be used things like clothes and electronics for a lower price.
When you are shopping online you will also want to be sure to pay with a credit card, because that is really your best bet when it comes to privacy and security. There are risks to other methods of payment such as checks. The best thing you can do to avoid a delay in shipment of the item you ordered or even identity theft is to pay with a card. Most websites offer their members the opportunity to pay with any of the major credit cards like Visa and MasterCard.
Make certain that whatever website you buy from is legit. In order to confirm this you can do things like seeing if they provide visitors with a real address and phone number for contact purposes. You might even want to call the phone number they list on their website just to confirm, because when it comes to the information you give out online you cannot be too careful. These are the things you will have to remember to do before buying from any website, because there are a lot of them out there that simply cannot be trusted.
You might even want to think about deleting your cookies after shopping on a website that uses what is called "behavior marketing". Websites like this use your cookies and browser history to formulate an idea as to what you like and they use that information to market you certain products and websites. If you hate spam and pop-up ads like everyone else, then you will want to consider avoiding these websites altogether, or at least clearing out your browser history after purchasing something online.