"Every couple has what I call a 'good conflict.' In long-term relationships, we often feel that the thing you most need from your partner is the very thing he or she is least capable of giving you. This isn't the end of love—it's the beginning of deeper love! Don't run from that conflict. It's supposed to be there. In fact, it's your key to happiness as a couple—if you both can name it and commit to working on it together as a couple. If you approach your 'good conflicts' with bitterness, blame, and contempt, your relationship will turn toxic."
We have all heard the feedback of sandwiching negative feedback between two positives. I am not sure how I feel about this recommendation because it can lead to confusion. If there is a conflict in the workplace, lovingly but directly outline the problem. Do not wait until the point you are frustrated, because that is counterproductive. I have made this mistake countless times.