Have you ever looked back over you 20s wondering if they had any meaning whatsoever? The author of the following article did:
Over the last few months, in the midst of panicking about not having a damn plan, I started to build a list of some lessons that came with my first decade of adulthood. My experiences began to feel more valuable as I considered what each of them taught me. As it grew, this list became a cozy reminder that even though my twenties seemed fleeting, they were actually full of personal growth. It helped my recent transition to 30 feel less like I had been mugged at gun point and robbed of my youth against my will, and more like a graceful step in the right direction wearing trendy, comfortable, ergonomically agreeable flats.
So, in case society is wondering, I do have a damn plan: to be too busy defining 30 to let 30 define me.
Read her list of lessons learned in her 20s at this link: http://www.huffingtonpost.com/katelyn-klug/thirty-lessons-you-learn-after-20_b_4303732.html?utm_hp_ref=mostpopular 
What did you learn in your 20s?