Elder Quentin L. Cook of the Quorum of the Twelve Apostles shares some of his thoughts on this subject.
How can I be a missionary now?09264_000_011
Overcome feelings that make you afraid to share the gospel.
Do not be discouraged.
Be a good example and take every opportunity to share the gospel.
My specific challenge to each of you is to make a commitment to be a missionary for the rest of your life. There are many among your friends who would respond to the gospel if you would have the faith to share the message of the Restoration with them.
Illustration by Brad Teare