I think the first thing you want to take a look at are shadows

Your scene is currently missing depth! But adding shadows will help with that.
Also I think you need to try and create a focus in your scene. Now its kinda busy (probably because of the non-existent shadows) but try to have a subject, and a surroundings. If you get what I mean...
Keep us posted about your progress! 3D is almost as addictive as any hard drug, so be wary
well if you need help just reply, Im not sure if there are a lot of blender pro's around but I think you will get some handy reply's
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