How can meditation help me balance my solar plexus chakra?

I have been meditating every day without fail for months now to stabilize my solar plexus chakra. There are days when I feel more confident and sure of myself, but there are other days when I feel empty and uncertain. I'm beginning to think that I must be doing something incorrect or need to do things differently. How does meditation work to stabilize the solar plexus chakra, and what should I be doing during my practice?