What's the matter with me?

Many times I find it hard to resist being too eager when I start doing something. I like to get results out of my efforts and always think I have to do a little bit more or there will not be any difference.
Like when I go to the beach I take too much sun in one day and become burned and loose the skin in the end. And when I start doing rehearsal of new songs I sing until I become hoarse.
And when I start shopping I shop until I almost drop.
Sometimes when I start laughing at something I just can't stop and I laugh until my muscles of the stomach really hurts, but maybe that has only to do with my personality?
I haven't been thinking much about it before, but now when I am blogging I start knowing myself better and start thinking being like me can't be normal.

I will tell you a secret! I wouldn't get out from the bed in the mornings anymore if I would resist to use the gel that's on the photo! My muscles are really hurting after all training and I think I have been too eager again! *sigh!* Do you think I have got a lack of moderation?
This is something I have to start working on now. I need to become more moderate and get myself into a better discipline. I really think I act like a child who hasn't got much experience of life! I don't like being like this!