I promised I would post this so students can determine their learning style to help improve study strategies.
It's hard to find any one good test, so here are a few and you can see what meshes with you.
Separates into 3 categories, pretty short, 9 questions:
Multiple Intelligences (longer survey, divides into about 6 categories)
This may be the best mix of simple, not too terribly long, and has 4 learning styles with some tips you can click on afterward:
If I find any better ones I will add them.
Here is a survey about study skills. I really love this one because when you are done, it gives lots of ideas and resources on how to improve in specific ways based on what your answers indicate you may need to work on.