If an online business, you need to go into detail how you will attract customers to your website. General statements will contribute almost nothing to helping your cause unless you have detailed statistical analysis of tests you have conducted or of another similar business you have been associated with. If you do not have any data upon which you reference your estimates, it could show lack of proper thought to the remainder of your business plan.
Next, I would develop a capital plan identifying dollars to be spent on the business to increase its overall value. While all capital dollars may not entirely be discretionary - i.e., investing dollars for anticipated return from growth - it is necessary to determine how capital dollars will be allocated whether for discretionary purposes or general maintenance. Projects that require capital are critical for the company growth and must be managed to their desired return, avoiding shortfalls in ROI or issues involving capital creep.