I have recommended FabJob guides to my clients for years. They are step-by-step guides to opening and running a wide variety of businesses.
The guides are instantly downloadable (also available in CD format) reasonably priced and filled with detailed information about a wide variety of interesting career options. This is one of the very few outside products I offer on my site (meaning if you buy one, I get paid a very small referral fee at no extra charge to you).
They have dozens of available titles, but here is a small sampling:
Become a Landscape Company Owner
FabJob now also offers short online certificate classes that you can complete in as little as a few weeks time. These courses are self directed, which means you may study and complete assignments at times that are most convenient for you from the comfort of your own home. The courses offer a nice way to get a feel for new business options without spending a whole lot of money. It’s a great way to test-out your interest, before investing in longer-term training (if needed) or start-up expenses.
Here’s a sampling of courses: