Consilium: Advice Tracker is the only advice tracking and rating app in the app store. Use it to create your own personal database of advice that you have been given. Tag the advice, mark the advisor, and rate the advice. Over time, cultivate your personal list of advice and know which of your friends give you good advice.
For instance: When someone give you advice such as: "You should really eat at such and such a place when you're in Sometown" you can type that it in, tag it to the person who gave it to you, then tag it the type of food and Sometown. Then next time you're there, you can pull up the Sometown and Food tags to see all the places people have recommended you eat when you're there.