Pretty much what reaper man said, that's some great crit right there.

Using the rule of thirds will eventually become second nature. Nature shots are really benefit by taking a somewhat normal subject, and having it off centre (this or this). A shallow depth of field really accentuates the subject of a photo (prev. example's DOF is too shallow imo). Most of your shots have a wide depth of field - finding what you saw as the point of interest in the photo isn't easy, it should be immediate. Using thirds and using a shallower DOF is the first step to better photos (in my opinion).


Learning basic skillls in photoshop of an equivalent program (I use lightroom), will help you to enhance your photos - adding depth and contrast, for example: this to this. I only use it sparingly, though. You sholdn't rely on post-processing to get a good result.


Make sure you're enjoying taking photos too - it's what keeps me going.