How to take pictures of the moon?

I have a Nikon D3000. I've tried changing the shutter speed/aperture, but it either just takes a black picture or takes an extremely blurred picture. How can I take a good picture? I'd really like to know, cause there's a lunar eclipse next week.

Remember that the moon is in the bright SUN. So manual exposure, manual focus, set your ISO at 200. 250sec at f16 should do you. Feel free to shoot at f11, 16 and 22 to learn more.

For shooting the moon itself, you use the same setting as you would shooting in bright sun (the same sun shines on the earth as the moon)

Shooting the moon during the eclipse, will require some adjustment, a few stops since during the eclipse, the moon will be lit by the reflection of sun off the earth.

With your camera on a tripod, shooting in the manual mode, shoot at 1/ISO at f/16 and then start opening the aperture of the lens until the darkened moon becomes exposed properly. That will be your exposure.

You should know because i don't want you to miss it but the lunar eclipse is tonight (monday 20th) it starts at 11:27 PM and ends 5:06 the next day. All of this is in CST time

I do not have an answer and considering the eclipse is taking place right now, it would not matter. I just wanted to say thank you for asking this question. I would not have known how to use my camera on the fly to attempt to take photos of the moon. They turned out ok, but my lens is rather hindering at 18-55 mm. Next time I will be sure to have a better lens.

For taking a shot of the lunar eclipse, you'll need to shoot on a tripod as the moon is considerably dimmer than normal particularly at full eclipse. Focus on the edge of the moon (high contrast area) and use a lowish ISO. Wide apertures require a shorter shutter speed which will help with movement.
Use your timer to allow any movement in the camera to settle down before tripping the shutter.

[EDIT] Well the proof of the pudding is in the eating! - Here's my shot using the above method: