Clover, buckwheat and oats here, but I focus more on early successional habit. Every year I go through my woods and will either girdle a few junk trees, or drop them if they're good firewood. New growth explodes once sunlight hits the ground. In the larger pockets I'll plant an oak or 3. I start a couple hundred acorns every year for this.
This years plan is to fill my foodplot with apple trees.