"I recognized the anguish, helplessness, and confusion in a friend's Facebook post when she shared that a colleague of hers had very unexpectedly taken her own life. I instantly went into 'helping' mode --sending her a barrage of advice on how to cope with this tragedy. I know the feelings very well...the immediate, acute sense of loss and overwhelming sorrow, quickly followed by the guilt, the regret, and the second-guessing those left behind wrestle...