Stuck

I know I want to go to graduate school, but I don't know what to study. I've always been interested in English and writing, and I'm pretty good at it. That's what my undergrad degree is in, after all. The problem is I don't know what I want to do. Actually, that's not true. I want to do lots of things. Possible careers I've bounced around in my head include:

• children's book author
• University professor
• copyeditor for a newspaper/magazine/publishing company
• Publicist
• Literary Agent
• Editor for a publishing company/newspaper/magazine

... I'm also interested in domestic animal shelters (Humane Society, etc)... I tend to get overwhelmed when I look at application processes for grad programs. I know I have the talent, I know I can do it. I don't know what my problem is or why I can't just pony up, study for and ace the GRE and go to grad school. I suppose it's a mix of fear of the unknown and an inkling that I'm not as good as I think I am. This is frustrating, and I often wish I had a fairy godmother to guide me and tell me what to do.