I suggested to one of my career counseling clients that she call 20 potential employers. She exclaimed, "I can't even say hello to a store clerk and you want me to cold contact 20 employers?"
That reminded me of how fear-filled many people are. So if even a baby step feels too big, ask yourself what is the microstep you could take: the step that is so easy, you wouldn't be tempted to procrastinate it.
For example, if you're too scared to cold contact even one employer, try writing a script for a 10-second pitch. Then read it aloud, perhaps into a recorder. Listen to the recording and keep trying it until you like it. Then give your 10-second pitch to a best friend. Next, call one prospective employer--one you don't mind at all screwing up with.