How do you do this ?

Hi Rascal1,
What type of a product/idea is it? Is it something for the health care industry? If it is an invention you can do research on prior patents on the website USPTO.Gov

There is a wealth of information that can be found on the internet. Start by doing Google searches using the key words you think someone would use to find the product/idea. Don't forget to also search blogs. You will also want to contact potential customers to get their input to be sure that it is something that people will buy and that it isn't just a great idea that no one will spend money to purchase.