Most landscape photographs will either have a dominant foreground or sky visible to show scale and grandeur. If you have a bland, boring sky with no features; then don’t let it dominate your shot. Place the horizon in the upper third of your shot and find something interesting about the foreground instead of the sky being the focal point. However if the sky is filled with dramatic cloud formations or colors let the sky dominate the image. If you have the ability you could also consider enhancing skies either in post production or with the use of filters like a polarizing filter.