Provide your customers with all the information you would want in their situations and treat them with the same courtesy and respect you would want to receive.
Here are some of the solutions to the top 10 customer service ills:
-Speaking to a person!
-Respond to all emails and calls within 24 hours
-Generous or problem solving refund policy
-Follow up after initial communication to verify the situation or scenario was fixed
For the others, just check out the LERN Club.