When it comes to landscape photography, many photographers like to stick to the golden light that is only available around sunrise and sunset, when warm, dramatic rays of sunlight cascade through the frame. However, if you only shoot during those times, you are missing out on a ton of photo opportunities. This great video tutorial features an experienced landscape photographer showing you why different times and conditions can make for worthwhile images.
Coming to you from Mark Denney, this excellent video tutorial will show you the benefits of photographing landscapes in different sorts of light. I firmly believe that good landscape images can be made in any light, but where people go wrong is trying to force a certain look or style that the available light simply is not conducive to. If you instead embrace the light you are given and work to its advantages, not only will you find the process much more enjoyable, you will come home with much better images, and your portfolio will be more diverse. Check out the video above for the full rundown from Denney.
And if you really want to dive into landscape photography, check out "Photographing The World 1: Landscape Photography and Post-Processing with Elia Locardi."
Artificial light can be used in certain scenarios too. Obviously you aren't going to be lighting an entire mountain range or miles of plains but if there are specific features you can pick out that a strobe can cover you can really get creative with it. I'd like to do more of that but where I live is as flat and featureless as a sheet of paper lol.