The best easy way to get great outdoor light is to put an outdoor HDRI in the scene background (under the scene settings tab). If you then render with global illumination it is super. It is still very good even without the GI.
Usually you need to bump up the intensity of the major distant light of the scene, often to 120%.
This bright light shows up small flaws in the highlight shaders sometimes. Some characters' highlight & shininess have to be toned down.