I guess the question I would ask back to you Darien is what part of the reprimand was deserved and what part wasn't. I have no idea of your job or the environment you work in, but sometimes it is appropriate to respond in a written format (to go in your personnel file) that outlines clearly which part you disagree with and why. Do you believe that you "go above and beyond" or just do what is required? Generally one is not entitled to the 15 minute break unless they are under some kind of union award demanding this. I also think the suggestion made by Grishny(?) about offering to take on some kind of team leader approach to get other's up to speed is a good idea.

Maybe a re-think of your work approach is needed? Don't just assume your boss sees you doing the good work, you need to bring it to their attention in subtle ways!!

Good luck :)