There are no easy ways in business, so you didn't quite phrase the question correctly. To sell effectively, you must have a sound sales strategy, use marketing skillfully and, of course, sell products that are in the HIGHEST demand in your region. This requires a detailed market analysis. If you don't know how to do this, listen to the advice of "The FBA Brand Builder" Darren Campbell; he has been selling on Amazon for a long time and knows all the tricks of the trade.