To write a personal business plan correctly, you have to take the time to think out the position, your goals, and the company's goals. You have to research the company and your specific desired position in it, analyze what it takes to be successful, and write what is, essentially, a "to-do" list for yourself. This list should take the form of incremental goals, ideally organized into a 30-day plan, a 60-day plan, and a 90-day plan. It is a lot of work to do before you even know if you're hired, but this kind of effort will set you apart from other job seekers and absolutely get a hiring manager's attention. Not only that, but it will increase your chances of success once you do get the job...because you've already mapped out how to be successful.
The 30-day part of the plan is the easiest to put together. In your research of the company and your discussions with the recruiter you are working with, you should discover what the company's training plan looks like-how long it takes and where you receive it. So most of the items in your 30-day plan should be along the lines of attending training, mastering product knowledge, learning specific corporate systems, traveling to learn your territory (if you're in sales), meeting other members of the team, or reviewing accounts.
The 60-day part of the plan usually includes more field time, customer introductions, reviews of customer satisfaction, fine-tuning your work schedule, and getting feedback from your manager.
The 90-day part of the plan is the "getting settled" part of your new job. It should include things that take more initiative on your part: landing your own accounts, scheduling programs, or coming up with new ways to get prospects' attention (again, if you're in sales), as well as continuing to get performance feedback and fine-tuning your schedule. Keep in mind, these examples are extremely generalized. The more specific you can be in your plan, the better. Research the company and the position, even if you've done the same kind of work for years. Your business plan doesn't have to be long and complicated, but it does have to show that you've done your homework, analyzed this job, and thoughtfully considered how you can best serve this particular company. That's the edge that will get you hired!