I agree on limiting your sugar, and I've seen a nice drop in LDL with the following changes:
two servings of oatmeal ~5X per week
Added nearly 1 serving of walnuts with my oatmeal
increase bean consumption to two cans (3 servings per cans) per week
And for raising your HDL, my HDL follows the amount of miles I walk each week. It's time consuming, but if you can find a couple of good podcasts or audio books, walking one hour per day would IMO improve your lipids fairly significantly.