I've seen some very nice images displayed here. If you don't mind, I'd like to offer a suggestion when composing landscape shots. Many of you are already doing this and that is placing your horizon in the upper or lower third of the image. Avoid having it run through the center of the image and be sure that the horizon is level.
Whether you place the horizon in the top or bottom third depends on which is more interesting, the sky or the foreground. Also, if there is an object in the photo, such as the one with the windmill and tree, place the object offcenter in the frame as that photo was. It makes it much more interesting and looking less like just a snapshot. Happy shooting. :wink: