The way in which we consume ideas and opinions has changed dramatically over the past forty years, as has our propensity to receive advice. It may be that investment tip your work mate told you about, or the advice of your father on your current lifestyle. But the truth is, the advice is most likely, useless. With the rise of social media, advice has become quite ephemeral, asking perfect strangers how we should act towards a certain act. So, for the most part, we can't trust the advice of family members or Twitters, but where does that leave us? it leaves us with the concept of 'Best Practices'.
'Best practices' is a concept that suggests that in order to exceed at anything, we must seek out those people who have achieved or are in the process of achieving a similar objective to you. It stands to reason that the advice and opinions of these people will be more beneficial than that of family or friends unless a member of your family has achieved what you want to achieve.
Let's take an example. You and a friend are enjoying what is an odd treat for you, a burger. You're not fat, but certainly not thin, the gym would not go amiss. Your friend, on the other hand, is a savant of fast food, weighs 8 stone over what would be considered healthy for a man of his age. Would it be acceptable to receive advice on diet from this man, who has no intention of implementing his own flawed advice?. Of course not, and you would be a fool to receive and accept such advice.
Instead, further your horizon, seek out people who do or are in the prosses of doing something you want to do or improve at. Read, listen, and actively talk to (if possible) people who truly have the knowledge you want. Let these people be your motivators, your teachers. If one seeks wisdom, one will find it, so go forth and seek.