Advice for writing a successful business plan can be sought out from a number of places. Forbes and Entrepreneur have websites with guides on how to write an effective business plan. Banks such as Barclays also offer this information online.

To write a business plan as an insurance agent you should include the executive summary, marketing plan and the key employees. You have to focus on your niche and write about how your business will be successful.

If the plan is to continue with the business proposal then proceed to write a business plan

I need to write a business plan to show the bank how the business will operate.

Bpland.com is a good website to learn how to write an effective business plan. The have templates for any type of business that you are trying to start.