Long exposures are something almost every photographer tries at some point, and they can be a fun way to create images that the naked eye would never be able to see. This great video will discuss some motivations for shooting long exposure images and how to do it.
Coming to you from Attilio Ruffo, this helpful video talks about taking long exposure photos, both why and how to do them. I personally love long exposures; they can be a great way to calm a chaotic scene and they always offer a uniquely different perspective on a landscape. As you'll see in the video, clouds can really make or break such a shot, as an empty sky can be a bit plain. If you run into this problem, I generally recommend considering converting the image to black and white and painting with the light in post a bit. Generally, this will allow you to push the sky toward white and take advantage of the contrast to bring out interesting elements in the frame. And of course, before you head out, make sure you have a good tripod and set of ND filters. Give it a try for yourself this weekend!