What is the best advice you can give a Jr Officer?

Listen and learn from your NCO's they can teach you a lot

Well Sir, in this day and age you have to tread lightly and watch your back.  We live in the world of information; so read about what your Soldiers job is and educate yourself.  Evaluate and learn who to listen to.  Rank does not make someone knowledgeable. 
You are stationed at a pretty high speed installation so you should find a great deal of experienced Leaders to learn from.  Never judge the Military from an assignment.  Most of all have fun, explore, and enjoy yourself!

Take advice of those junior soldiers who have been in a while. Just because they don't have stripes on there chest, doesn't mean they don't have experience and sound advice. Being a SPC who has been in for 5+ years, this is the hardest obstacle that I have encountered. 2LTs and 1LTs not listening to their soldiers. Remember you as officers are leading them to war and if their voice isn't heard as well, what makes you think those junior enlisted will hear yours.

I see it posted throughout this thread Capt. Your NCO's make you or break you. 

Carefully and diligently consider the advice of your experienced NCO's before making critical decisions.

I can speak to my LT time at Ft. Campbell and what I would tell you is spend time learning your job.  There is so much to learn from your NCOs and Soldiers, from your peers, and from senior officers that it is easy to become confused on what the "hard right" and "easy wrong" are.  Your moral compass will determine the what you take to heart, but all of these skills you will need as a more seasoned company grade officer and as a field grade.

As a young enlisted soldier, the best advice I could give would be to make sure your soldiers are taken care of. Generally NCO's do a pretty good job of this but as a joe I know when I notice an Lt taking the extra step to make sure his soldiers are getting chow, sleep, or what have you, It motivates you to work harder and at a higher caliber level.
Taking care of your soldiers will in turn take care of yourself. 

The best thing a junior officer could do is to listen to the senior NCO's who have the knowledge, experience and training. Senior NCO's hold many duty positions as they grow in rank, as do officers, but one thing I've learned is to mold an officer into a better leader. Unfortunately, some of the junior officers that I've worked with don't want to listen and do their own thing, regardless of what insight a seasoned senior NCO might have to say.

Take advantage of every self improvement program they have. Take your schooling seriously. Don't spend unless you have to. and most important, never lose touch with the understanding that people are humans, they live, love and bleed like you and I. Compassion and empathy go a long way. never blindly follow orders, if it doesn't feel right, it probably isn't. ask your self, would you have this done to you or your family??