Pick a business model that actually has a chance of selling something. Close shop if you business model relies on advertising for the main revenue stream. Recognise that people buy things from your website when they can't find it in the corner shops. Don't feel you have to put your whole inventory on the web. Remember that you shouldn't serve more than one customer at a time and you should attend to each customer individually.
Every sale counts more than a splash page.
Return sales count more than browsing clicks. You have to deliver on what you show. And you have to do it better than the competition. Don't waste time chasing outside investment. It' s dead easy to piss away grants and venture capital, but more difficult to squander your own.