Beware of people that have nothing to lose when they give you an advice. If you take those advice without asking yourself if they are good or not, then you can find yourself in trouble.
“Men are often biased in their judgment on account of their sympathy and their interests.”
– George William Norris
When the advice will not put them in peril, they will give you the first things that come up on their mind. With average source, you will never get more than average results.
People that have some kind of interest in your success, they will take the time to think about their advice to you. They have something to lose if you fail.
You can still find some really good people that will give you the best advice without any way of getting anything back from your success, but those people are sadly hard to find.
In the end, you are in charge of your success. Good or bad advice will not be the only factor.