I know many people who will move on to the private sector now that the campaigns are over. Heck, many of the losing candidates have already accepted jobs in the private sector. Of course, many will be starting businesses of their own.

Growthink has an invaluable resource for entreprenuers. Their business plan help center offers such tools as a business plan handbook, market research, start-up cost calculators, cash flow calculators, and even slide presentation software. The calculators alone are something every new (and old) business should be using.
business plan resource
Successful businesses are often those that are well-planned from the start. You need to know whether it will pay off to make that big investment in a certain area of your business, or if that money is better off spent somewhere else, or not spent at all. Things like discounted cash flow might as well be ancient Greek to many new business owners, but understanding how to use a discounted cash flow calculator is key to understanding how much potential sales 5 years from now are actually worth today.

It's those little things that will often decide whether a business succeeds or fails, and Growthink's Business Plan Help Center is a great start to making sure your business does not fall victim to the latter.