How do you get out on time?

How do you get out on time???? I hate working over shift, yet am forced to do it every time. I come in early, get right down to business, work hard, don't take breaks and yet can never get done. Every one else is in the same boat and have to stay over too. Our staffing is not bad, about 5 pts. per nurse on a med-surg floor and we have techs, RT, phlebotomy, ward clerks. It is so discouraging. Last night it was theoretically "quitting time" and there were two units to hang, charting to do, meds that needed giving that were late including 2 IVPs, a dressing that didn't get changed. Yes, I can pass some of it on but that is really unfair to oncoming shift who are trying to get oriented to their patients. I can't figure out a way to get everything done. I really felt sick and actually thought I was getting the flu it was so demoralizing.