Having looked at some of your other photos on flickr, one thing I would say is when taking pictures of landscapes it usually works better when its not so central. So if there is a really good sky then compose it so that more sky is in the picture or if the foreground is more interesting show more of that. Generally it works better when the subject is on a third (if you know about the rule of thirds) it makes the picture more pleasing to the eye
There are some nice landscapes on you flickr though, just need to perfect the details.