Focus on the Customer

Quite often product management is focused on the product/solution that is taken to market.  I would argue that it is not the product that is important.  It is the customer.  Unless you have a very clear understanding of the customer context in the market that you are trying to address, you have a solution looking for a problem, which inevitably leads to failure in the worst case, unnecessary resource (cash) consumption and delayed success in the likely case.