Here are four quick tips for better landscape photos.
1. Angle of View. The wider the better.
2. Time of Day. Sunrise or Sunset are usually the better times.
3. Having an interesting foreground is better.
4. Leading lines can add more interest.
Having said the above, if you want to have an interesting landscape stand in front of something interesting...and remember what Picasso once said, "learn the rules like a professional, so you can break them as an artist".