Advertising. Advertising must be targeted at specific customers like at forums. Such as these. Spend at least 4% on advertising, but not so much as of 10%.
The ads must be straight forward, and you must gain the trust of the people. Flashing banners do not help towards this goal. Also, you must partner up with big name brands, and buy in bulk to save money. Partnering up with them or gaining a contract may be or may not be a good thing, depending on the company itself.(What I mean is, gain the trust of the company, Such as new Egg. The reason why New Egg is so cheap, is because they buy in high bulk volumes, which enable them to charge less, while making good profit) Make you do an extensive study on the overall growth of the company.
Also, do not pick a “non-trustworthy†store name. For example, “Cheap Cheap Computers†Almost the most important thing in running a business.