In your daily life, you likely use items that seem to be ordinary. These items seem so ordinary that we often forget that there was once a brilliant mind that thought of the idea behind that product. Inventors of useful items like post-it notes earn millions of dollars every year for these products. Post-it notes earn over $1 billion in sales every year. Taking a look at the unexpected lucrative products that surround you may even help you to feel inspired to pursue a patent for one of your own ideas.