Whatever your business and whatever size your business plan, your first and most important question to answer is "Do I have enough leads?"
Who is going to hire you? Who is going to buy your widgets? And how will you find them?
The two primary ways to get leads are to seek them out (prospecting) and to attract them to you (marketing). The leads part of the plan is to create an executable strategy to find those leads for your business.
Abundance in your business may start with vision and require profit, but it lives and dies with leads.