It looks like you already have a pretty good idea where it is supposed to be green and not. I love the landform, greenery and mountains. What is distracting is the deep water that looks like a rendered Difference Clouds layer set to Overlay over deep blue. It sort of pulls the eye away due to both the pattern and the deep blue color. The land is made somewhat drab and uninteresting next to the water. You might try going for a more subtle effect to see if you like that as well. You can always switch back if you prefer the Blue Velvet look.

One thing that I've recently found that works is to have a light blue water texture that you fill the water layer with. Then select the landmass (I'm presuming that the landmass is on its own layer, so selecting by Alpha should get your landmass selected). Grow (Expand in PS) the selection by around 40-50 pixels. Invert the Selection and fill with a solid darker blue color (on it's own layer). Then set the Layer Mode to Multiply and drop the Opacity down to about 70-75. You get both your shelf surrounding all the landmass and a fairly subtle, but still interesting deep water appearance. That's just a suggestion though.

Good luck and keep on with the map. I think the results are going to be pretty awesome when you are done.