Consider however that the people writing the answer key might not get it right. In fact, there's some research that suggests that as much as half of what we learn now will be proven to be false in as little as five years! How much more so for answer that are more subjective like - "What's the best ___ for me?" The "for me" part is incredibly important to you, but not to the gurus and thought leaders selling you the "right" answers.
If you want better outcomes, you'll need better understanding of the situation/problem/opportunity you're struggling with, and you'll need to find it on your own. Don't get me wrong, there's a lot of help available online. By all means you should use it, but the responsibility is yours to get the degree of understanding you need. Wikipedia can be a great place to start, but never a place to stop.
Think you understand it enough? Prove it by trying out your understanding in the real world. Putting what you think you know into action will certainly decrease the time you need to gain understanding. It will help you separate the gold from the glitter. Then if you really want to fully understand, try teaching it to someone else.