I've been kicking around a painting for little while now, and I'm discovering that I have a real problem with lots of intricate details. I think I put so much effort into any little thing, that multiplying the number of little things becomes quite painful. Does anyone have any tips for adding random detail to your pieces without making it look like a 2-year-old scribbled across something you did?

To get an idea, here're two progress shots of the thing I'm work with.
It's obviously not finished yet, but unfortunately I just don't know how much more little detail I can add. A forest scene just doesn't seem right without all those little details, and its somewhat discouraging to know I've got a strong piece going when I'm not sure if I'll be able to kick out that last bit of polish.



Too many people hear of a silver unicorn and picture a white horse; I had to try coming up with what a silver-haired horse might really look like. That's what I enjoy in art, taking the non-real and trying to make it real.
Glad my bluntness was of help.