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.
At the end of the year, a thorough review of the plan and its process should be discussed with the team in order to make the next planning cycle more effective and efficient. Take a look at all of the successful initiatives and the ones that fell short in order to identify where the broken pipes occurred in the process.