Well i'm okay at photoshop, i'm not pro. I want to see how you would fix up this otherwise "bad" photo. I'm posting my take on it right below. What i did was make selections in a new layer one for the beach and trees, the other for the sky. I put color on the new layers and blended them into the original layer. Adjusted curves and channels.

Name:  original.jpg
Views: 1055
Size:  213.3 KB

Name:  edit.jpg
Views: 924
Size:  93.9 KB