This is a hard one. There are so many people around who will just want to kiss your butt. Think of paparazzi. Everyone wants a piece of you. So what to do?
Here it is: get people, but only some people, i.e. your ministers, to understand that you want them to tell the truth. Only when you ask, though. Also, make sure they get that you are the decider here, not them.
One Bishop, Luca Rainaldi, never got advice and he also never got anything done, because he was always changing his mind. Don't be like him. Get your advice and make your decisions.
Remember that a good minister and good advice won't help you if you are a bad leader, because they will just take over. You have to be a good leader to begin with to take advantage of a good minister.