Online shopping may be the 'thing' these days and there are a plenty of websites that bait you to buy QY6-0049 Printhead Print Head Printer Head for Canon MP750 MP760 MP780 860i 865 i860 i865 MP770 MP790 iP4000 iP4100 Nozzles on the net, but there's none of them that could guide you - giving out the basic fundamentals of buying stuff online. So , assuming that you've got all specifics packed about the need to is included with goods online. Mathematics is never cool, especially for me - so for those like me or maybe otherwise I suggest you to understand the mathematics behind the discounts while offering. Take your time - understand the cost, the discount and do a few calculations; trust me you'll never get wrong. Stop Buying Things You Already Have - The problem with most people is that they tend to buy everything that they like - whether or not they already have it in abundance, which can be never a smart buyer's attribute. So what you need to stop carrying out immediately is stop buying the things you already have - remember there will be another day so you can purchase something new the next day.