Advice is a tricky beast: when we really need it, it can be hard to find, and when we don't need it, it's often forthcoming from all angles, completely unsolicited. It's kind of a Murphy's Law situation, but for advice rather than luck.
A thread on r/AskReddit, "What advice did someone give you that changed your life?", is a great compendium of advice that's actually impactful.