Natural remedies for ADD?

I’ve been having trouble concentrating lately. I’ve never been diagnosed with ADD, but that’s what it feels like. I have difficulty keeping on one task and finishing jobs. Doing my schoolwork is the hardest—especially reading. It doesn’t matter how interested I am in the topic, it’s like my brain can’t sit still.

Does anyone know of any natural remedies for possible ADD? Any personal experience/trial and error stories would be greatly appreciated.