I think about the primary program every Sunday, if not every day! I am always "writing" the primary program in my mind or with the songs.
Having written many primary programs in my life, I assured my friend she would be ok and that I would help her. (She is really nervous - this is her first time doing this!) I told her the most important thing to remember is that it is not you writing the program. The children are bearing their testimonies of the things they have learned and know throughout the year and you are just organizing their thoughts. Heavenly Father will let you know what the ward needs to hear from the primary children.
I have had many experiences where I have started writing the program and been overwhelmed by how strong the spirit is and how much Heavenly Father loves these children and also the members of the ward.
The music is icing on the cake for the primary program. Bearing your testimony through music is so amazing. It can bring the spirit into the room. The children LOVE to sing and they do a great job! And my job as the chorister is made easy by those wonderful little voices singing praises to their Heavenly Father!
So, now it is primary program writing mode! I can't wait to see what amazing things the children come up with this year!