For now, just write. Don't worry about using correct grammar or coherency or names ..
Just write whatever comes to mind, whether it makes sense or not.
Try describing a scene, an emotion, a memory ...
Brainstorming works great, as well. Just list any random word and branch off.
By doing this, you start thinking and searching your mind (rather than staring at the blank page/document hopelessly). With creativity comes great ideas; inspiration. One thought leads to another, and sooner or later you will find yourself will at least a sliver of an idea for a plot. From there you can fully develop the idea, by adding subplots, characters, etc.
Start small and build on the idea; don't try to come up with a huge, complex plot all in one go. Trust me when I say it's much more difficult. Take baby steps for now.
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For your characters/protagonists/antagonists, I have two suggestions for you.
You can choose #1, #2, or even both; whatever works best for you.
1. Ignore the name; label them X or B or something for now.
Build their personality, background, appearance, beliefs, etc - try to go into detail and create a vivid mental image for yourself (if you're feeling up to it, you could even sketch them out).
Some writers find that, after they have the actual character thought out, the name nearly jumps out at them as if it was meant to be. If not, well, you have other options.
2. Make a list of names you like; both male and female. You could start off by listing names of people you know, names you just like, etc. You can browse websites (such as babynames.com), or even scan the baby section here on Yahoo. There are hundreds of thousands of names out there; surely you'll find one you like eventually.
One last thing -- never use Yahoo as a last resort (or as an option at all, for that matter). Always keep brainstorming / developing / writing until you come up with something on your own.
The moment you begin to rely on Yahoo for ideas is the moment your entire story begins slipping. Don't let that happen.
I think I've covered everything I wanted to say. :}
Hope this helped.
.. I'm going to bed now. G'night.