The NY Times has an article about the science of learning.
According to the article there is no evidence for different learning styles like visual or auditory or left-brain or right-brain.
What does work is:
- alternating study environments (now in this room and then in that or even outdoors
- mixing content (a bit of this and a bit of that; this works better than first doing everything of subject A and then everything of subject B)
- spacing study sessions (today a bit, tomorrow a bit, next week a bit...)