Summarize this article in one sentence.
Some online retailers allow you to keep your credit card information and address on file so that check-out is easy and streamlined. Don't keep this information on file and make yourself manually enter it in. Getting up and punching in the numbers to your credit card may give you enough time to realize you don't actually want or need the item. Opt out of keeping your information on file. Some retailers keep this information on file if you sign up as a member, so use the "guest" option instead. Disable the "Autofill" option in your browser so that your address or other personal information does not automatically pop up. Just like you can put items on hold in a store, use your wish list the same way. Keep the items you like but are not ready to buy on a wish list. Unlike retail stores, online retailers often have more stock, so the fear of the item being gone is less likely. Go back onto your wish list later and clean out the items you no longer want. If something still catches your eye, decide whether it's a worthwhile buy. If the website allows for one-click buying, disable this feature. Put all of your items into the cart before purchasing them. That way, you will see what the total amount is altogether and decide whether it's in your budget. You might get to check-out and realize you're spending much more than you want to, then remove some items from your cart. If a website is making the checkout process faster, beware that this can increase your impulse buys.

Summary:
Don't keep your credit card information on file. Hold items on a wish list. Disable one-click buying.