Understand the times and know what Christians should do (cf. 1 Chron. 12:32). Practice correct and appropriate Facebook involvement and engagement. One’s trusted spouse can be a savvy observer for this. :)
Excerpts:
(1) Monitor yourself for unhealthy behavior. (2) Restrict late evening and early morning for other activities. (3) Avoid narcissism and present one’s true self. (4) Pay special attention to specific Facebook friends each month. (5) Be skeptical of how others present themselves on Facebook. (6) Periodically abstain from Facebook. (7) Develop a philosophy of what a Facebook friend should mean to you. For me, this means presenting thoughtful material to as many people as possible, which includes apologetic engagement.
To be salt and light requires an understanding of culture and its effects on us all. We should be like the tribe of Issachar, “who understood the times and knew what Israel should do” (1 Chron. 12:32).
Facebook and related social media tend to foster the overexposure of the underdeveloped self by facilitating the mass distribution of text and images related to oneself. The problem is that one may expose a self that is not mature enough for that exposure. As the Book of Proverbs so often says, the wise hold their peace, but fools proclaim their folly. One should choose confidants carefully (see Ps. 1). Some aspects of one’s life should be concealed. There is much folly, frivolity, and triviality in social networking. Not everyone should know everything about everyone. While secrecy wrongly conceals vices or wrongdoing, confidentiality is prudent because it shields things that need to be kept out of view. Social networking makes the broad distribution of text and image virtually effortless, and many lack the discretion required to hold their peace. One Facebook post lamented that a woman’s husband had treated her harshly in a way that never happened while they were dating. This was a cry of pain, but Facebook was not the place to air it. This confidence belonged in a marital discussion, in prayer, and perhaps in a pastor or counselor’s office.
"The more the words, the less the meaning, and how does that profit anyone?" (Eccl. 6:11; see also 5:1–2). The same is true for images. Many Facebook users recklessly post photographs of themselves in immodest and/or narcissistic poses.
What is called social media may become profoundly antisocial. Some who are immersed in social media prefer such media over face-to-face encounters. This furthers the technological problem of “the absent present”: although someone may be right next to you, she is immersed in her cell phone, Blackberry, iPod, or laptop.
Practice authentic Facebook engagement. Facebook caters to narcissism, with many people presenting flattering images of, and words about, themselves that are unreal. Therefore, we should evaluate the “presentation of self in everyday life” on Facebook.10 Does the content we post reflect our God-given nature? Are we being authentically ourselves here, or are we hyperactive and hyperconnected pretenders? God knows: “For God will bring every deed into judgment, including every hidden thing, whether it is good or evil” (Eccl. 12:14).
Abstain from Facebook or other social media if you find yourself obsessing on it or if your interaction is bearing bad fruit in your life. One’s spouse can be a savvy observer for this. It is easy to lose track of time or not notice what so much time online is doing to one’s character. If a spouse or another trusted person is concerned about your involvement, hear them out and take stock of your situation before God. According to the Book of Proverbs, one of the qualities of a friend is their willingness to challenge the attitudes and behavior of the one he or she cares about. “Wounds from a friend can be trusted, but an enemy multiplies kisses” (Prov. 27:6).
"Everything is permissible for me" - but I will not be mastered by anything" (1 Cor. 6:12).