Matthew 7:1-5 says:
Judge not, that ye be not judged.
For with what judgment ye judge, ye shall be judged: and with what measure ye mete, it shall be measured to you again.
In the JST, the first verse has been altered slightly to read:
Judge not unrighteously . . . but judge righteous judgment.
Just as a starter this month:
My favorite definition of "righteous" is "right with God" - so when dealing with judging righteously, my best definition would be to judge as God would judge. Phrasing it that way is critical to me, as it is the very foundation of how I see the command and its application for me - for the following three reasons, especially:
1) I believe we simply don't see the big picture AND don't understand others well enough to judge as God judges - so we are commanded simply not to judge.
2) I try to be analytical and strive to understand, but I try just as hard to avoid "judging" (acting as a judge and pronouncing a sentence based on guilt or innocence) - because I simply don't know exactly why most people think and do what they think and do OR exactly how accountable they are for their thoughts and actions.
3) I want to be judged with extreme leniency, so I try to be as charitable and non-judgmental as possible. That alone is worth contemplating regularly.