In no particular order:
Advice is usually worth (at most) what you pay for it.
The harshest lessons are about trusting the wrong person.
No one will have more words for you, than a lazy person who wants you to do something for them.
Judge weak people by their natures, and strong ones by their goals.
If possible, don't be poor. If you are though, be wary of following advice on this topic from people who have never been poor for an extended period.