Learn what your camera (and by extension your chosen software) is capable of. As I don't know what you are shooting and processing with it is hard to help here.
Practice, a lot. At all times of the day, not just sunrise and evening. Learn to capture the type of image YOU want to spend time processing, or sharing with others. That is the nice thing about digital, the shots are free, so you can easily experiment. What pleases you might not please others, so take criticism for what it is worth and don't get discouraged.
Try to visualize what you will want your finished image to look OR feel like, prior to releasing the shutter. Sometimes when you are under pressure due to time or other constraints, this may not be possible. But you may find this helpful in getting a final result you are pleased with.
Don't be afraid to crop your image!
I always feel I am the "Master of Disaster" when it comes to processing, and If I see something later while looking at the image on the computer screen, I will not hesitate to crop. It is no different than changing colors or white balance IMO, you are in charge!
Take your time during processing. Sometimes I spend just a few minutes on an image, sometimes hours or days.
Avoid getting into a set and expeditious way of working. Take as long as it needs to take, and be patient.
Hope this helps.
