If you are poised to make an online purchase, stay your hand a moment and check out this site. RetailMeNot is a collation of voucher codes for 50,000 plus online retailers, many volunteered by users of those services, others by the retailer themselves. Many of the vouchers don't work, but quite a few do, and deliver substantial discounts. Users rate the effectiveness of each code. Australian retailers are also covered in the mix. As they say in the classics, why pay full price?