This is a great post, Andy. I would like to add some little more tips to it.
First and foremost, As a young professional you can equally learn a good deal from your super ordinates at your work place by putting on a ready to learn attitude.Ask questions as much as you can but be moderate and polite in your approach. Never give them the "I know it all" attitude.Once they observe that you are willing to learn definitely they will be more than willing to lend a helping hand.Remember, the fastest way to gain experience is to learn from others.

Also,as a young professional, you need to equip yourself with necessary skills to succeed at your job and you must keep learning new skills at all times.You can join relevant online communities and forums to keep abreast with latest trends in your field. This will greatly enhance your knowledge base.

You may also wish to attend workshops and seminars from time to time if you have the financial resources to do so. The dividends of this is enormous as well.