Like any other endeavor that combines hardnosed factual analysis and creative freethinking, the task of writing business plans generates a range of opinions. Find at least six sources of advice on writing successful business plans (focus on start-up businesses that are likely to seek outside investors). Use at least two books, two magazine or journal articles, and two websites or blogs. Analyze the advice you find and identify points where most or all the experts agree and points where they don't agree. Wherever you find points of significant disagreement, identify which opinion you find most convincing and explain why. Summarize your findings in a brief formal report.