I like to look in places where people have "already" shown a great interest in "what they want"...by purchasing with their hard-earned money.
I used to subscribe to Standard Rate & Data to see what lists were available of people who actually bought products.
I'll never forget the list I saw for a product that was a small plastic figure of a very fat Buddha. The ad read; "Rub The Buddha's Tummy for Money! send $7 to box...." When I looked at how many names were available of ACTUAL buyers of this thing...I stared in amazement when I saw the number, 3,720,000. So, this told me MILLIONS were interested in "Magic Trinkets" to help them "get" money.
Nowadays I check 2 sources of actual BUYERS;
1)
http://pulse.ebay.com
Click around in there to see what are the TOP SELLERS in various categories
2) Amazon..."Movers & Shakers List" and their "Best Sellers List".
These give me an idea of WHAT people are willing to buy...nowadays.
Don Alm