1.  Learn that you are in the right place.  Your call came from the Lord; you have been given the responsibility for your own growth and that of those you serve.  Go to work and you will learn to love your calling.  Pray for the spirit of your calling and a quiet peace and joy for the work will fill your soul.

2.  Prepare.  Survey your assignment - the lesson you are to give, the activities to plan for, the leadership meetings to attend.  Mark your calendar in advance and plan your Primary assignments.  Make scripture study a regular part of your preparation.  Prepare so well that you can give your lessons without always looking at the lesson manual.  This enables you to personalize the lessons and to be more easily led by the Spirit.  Stretch yourself into preparing to teach with variety.

3. Get to know the children.  Speak and write their names as often as possible.  Encourage each child to express himself and participate in the class discussions.  Your love for Priamry will grow as you learn to love the children you teach.  Enjoy the children.  Laugh with them, appreciate the qualities of childhood, and learn from them.

4.  Be happy in your important service.  Blessings will come to you and the children as you engage in the work of the Lord.  You will experience joy as you see the children you teach grow and mature and as their testimonies and your own increase.
 

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And finally, the talk by Henry B Eyring in the November 2002 Ensign.  Some excerpts:
"You are called of God.  The Lord knows you.  He knows whom He would have serve in every position in His Church.  He chose you.  He has prepared a way so that He could issue your call.....The person who was inspired to recommend you for this call didn't do it because they liked you or because they needed someone to do a particular task.  They prayed and felt an answer that you were the one to be called."
"You are called to represent the Savior.  Your voice to testify becomes the same as His voice, your hands to lift the same as His hands.  His work is to bless His Father's spirit children with the opportunity to choose eternal life.  So, your calling is to bless lives.  That will be true even in the most ordinary tasks you are assigned and in moments when you might be doing something not apparently connected to your call.  Just the way you smile or the way you offer to help someone can build their faith."
"There will be times when you will feel overwhelmed.  One of the ways you will be attacked is with the feeling that you are inadequate.  Well, you are inadequate to answer a call to represent God with only your own powers.  But you have access to more than your natural capacities, and you do not work alone.  The Lord will magnify what you say and what you do in the eyes of the people you serve."