Actually it's quite easy. Sometimes you don't even need a tripod if the moon is bring enough. I just took one just now from my window. Used shuttle of 1/600sec. Even with 10x optical + 1.7x Digital= 17x zoom, all the image turn out very nicely. I didn't bother to use tripod.
If you camera have manual setting. Just focus on the moon, zoom to the max. amount and snap! Take a few at various shuttle speed till you can see that it is not over-expose or under-expose. Turn of flash as it is totally useless.
Mount your camera on a tripod to play safe if you don't have a stable hand.
As for the failure, the pic taken is not clear enough even with tripod. Using CoolPix885 wif Fine setting: 1/1000, F7.6, Auto ISO, max zoom @ 3x optical + 4x digital.
Perhaps I should get a good add-on lens for better zooming!