The reason for these changes is to ensure that we get good quality content. The way that it is determined as good content is by all of us, the Community! Therefore, if you see a question or thread that you think is high quality or is asked well, go ahead and "Like" or Bookmark it.
Similarly, if you see a response that is well thought out and/or has helped you solve your issue, go ahead and "Like" that too! Of course, if you asked the question, make sure to mark the response that solved it as the "Correct Answer".