Psalm 82

Both the NKJB and RSB study notes mention translation and interpretation difficulties with this Psalm.

The word, 'gods' can be interpreted different ways.....as angelic powers, lesser than God;
or perhaps deities that are made subordinate to Him, or as human judges, set in place by Him on earth. (RSB study notes).      The NKJV mentions only pagan gods, or human judges.

At first reading, I took the meaning to be this:

God alone is Judge.  He is above all 'gods' and is sovereign over all.......nations, authorities, etc.  He is aware of all that happens.

Human authority is set by Him, but these judges need not se themselves as being any better than those under them.  All are equal in His sight,.....the poor, rich, lowly and lifted up.....are all His children and will come to the same end-----death and facing Him.

Therefore, watch how you judge.....for you will be judged.  Do not show partiality.  Defend the poor and fatherless.....do justice to the afflicted and needy.  Deliver the poor and needy.  Rescue them from the hands of the wicked.  
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My thoughts are that my guiding principle needs to be this:
What if God judged me the same way that I judge others?  I am hasty, harsh, unmerciful, finite in knowledge of the whole situation, perhaps proud and puffed up, 'holier than thou', etc.

Be merciful! (without enabling or condoning sin!)
Be fair!    Be gentle and kind!    Be helpful.....meet needs.  
Be humble.....knowing your proper position before God.
Be open to being judged by Him, like you judge others.

Now there's a truly scary thought.   Enough to make me sit in silence a little more often.