Chrome: Amazon makes it convenient to buy just about anything, but if you're on a budget, the site might be too tempting sometimes. That's where Amazon Contemplate comes in.
The Chrome extension forces you to wait 30 seconds before you make an Amazon purchase. It pops up when you click to add something in your cart, then asks if you really want to buy whatever it is you're thinking about buying. You can either close the tab end save your cash or wait for it to timeout, then proceed with your purchase.
Is it annoying? Yes. That's kind of the point. If you have a hard time resisting Amazon, this tool helps you get in the habit of thinking about your spending. To try it out for yourself, head to the link below.