Meg Jay: Why 30 is not the new 20 | Video on TED.com
This is an important talk on something that many of us believe that we know now days, but in reality rarely follow due to new social constructs. Your time is important, do not waste it at any stage of your life. There is never a time where you can just completely wind down, because it all builds up into what your life is, and will be.
I think this is especially important to people dealing with mental health, because often 20s is the start of where issues seriously come into play, and it's how you deal with it when you're young that sets the course for the rest of your life. It's where you choose to stand strong and learn to get on, or go into adulthood very dependent on others, where you choose to let mental illness define your life, or learn that mental health is just another part of life.
What it comes down to is that your 20s are more important than people let on, and that you cannot waste time.