The first step is that put eyes on the product. You should calm to think about why you need these one, because people always buy something with impulsive.
Secondly, comparing brands, prices and performances with other alternatives. For example, there are many smart phone in market such as iPhone, Samsung and so on. Different phones have different meirts. You can draw a conclusion which one is suitable for you through comparing.
Next, that is a painful and realistic decision. You could borrow some money from your rich friends to get the good. There is no doubt that money is not significant to them. You need not to return money as soon as possible. It's just a kiding. You could seek a part-time job to get extra money.
Finally, getting a coupon is a good suggestion, which is beneficial to save money.
If the thing is not cheap, you should think clearly first. Then, working hard to make money for these one.