Wisdom

So,
Everything, in the end, comes to a choice and when I say everything I really mean EVERYTHING!
But what makes a good choice good? How can I be sure I made THE good choice if I'm not sure what's good or what's not and I don't mean the obvious answer but the true, meaningful, very essence of good.
What about choosing your friends? because whoever said "Choose your friends wisely" sure was wise:))
But how am I (as a simple human being) supposed to know them if i don't really know them? So, my dear friend I ask you because my superpowers failed me twice...how am I supposed to make that good choice without making the bad one and measure the outcomes?