(((((lmg)))))
Depression can make life seem so pointless, but don't forget that a lot of those thoughts of pointlessness and emptiness is the depression lying to you. I know how hard it is to untangle our true selves from our depression and I'm sorry you're having a rough time with it right now. No one is worthless and every life has value in its own way.
You matter.
I agree with muffy -- maybe small changes are best. Do things in baby steps, even if it just means trying out a new cereal at breakfast or walking around the block in the opposite direction or reading the funnies before the rest of the newspaper. Even tiny changes can help change your perspective.

Good luck and take care.