Moments of Nothing

Today is one of those days when I feel like nothing has been accomplished, and nothing I am doing is making a difference. It doesn't help that I have had a headache for most of the day, and haven't felt like doing anything. But I think a lot of it is me not having a positive attitude about what I have done. If there are no huge accomplishments, I don't feel like I have done anything. I guess I just want to have a purpose, to have some sort of positive impact on this world.