Your best business adviser is your customer.  

You customer makes it very clear what they like – they buy it from you.  

You customer makes it very clear what they love – they buy it from you repeatedly.

Your customer makes it very clear what they don’t like – they don’t buy it from you.  

Your customer makes it very clear what they hate – you never hear from them again.

The only thing you need to realize is that your customer is truly your best adviser.  But they don’t speak through reports, or focus groups.  They don’t even speak the truth through their words. Customers speak the truth, loud and clear, through their wallets.