Effectively confront people

Confront your team members privately, not publicly.
A public confrontation can affect their self-esteem and result in poor performance.

Do it as soon as possible.
The earlier they realize their faults and make adjustments, the better for your organization.

Concentrate on one issue at a time.
Avoid overloading them with a long list of issues at the same time.

Focus only on actions that can be changed.
Frustration builds when you ask a person to do something he or she is unable to do.

Avoid sarcasm.
Sarcasm signals that you are angry at people, not at their actions, and may cause them to resent you.

Avoid words like always and never.
They usually detract from accuracy and make them defensive.

Present criticisms as suggestions or questions if possible.
For example, instead of telling someone their idea was terrible, try suggesting a different option and asking them what they think.

Avoid apologizing for the confrontational meeting.
Doing so may indicate you are not sure you had the right to say what you said.