You can know you have been a successful…when you:
• Feel the Spirit testify to people through you.
• Love people and desire their salvation.
• Obey with exactness.
• Live so that you can receive and know how to follow the Spirit, who will show you where to go, what to do, and what to say.
Work effectively every day, do your very best to bring souls to Christ, and seek earnestly to learn and improve.
• Help build up the Church (the ward) wherever you are assigned to work.
• Warn people of the consequences of sin. Invite them to make and keep commitments.
• Teach and serve other others.
• Go about doing good and serving people at every opportunity, whether or not they accept your message.
When you have done your very best, you may still experience disappointments, but you will not be disappointed in yourself. You can feel certain that the Lord is pleased when you feel the Spirit working through you.
Preach my Gospel, p10