Set up a Post Office box for all your business mail. It's best to do this, rather than put your family at risk by using your physical address. This is especially important if you are doing most of your business online. Don't ever post your home address online, for any reason.
Look to your own passions or needs to create a product or business. The best products solve a problem or fill a need. Look at problems that need solving in your own life, and think of products that might solve them. Chances are, if you experience a certain type of problem, many others do too.
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