See my basic routine page to see a couple of possible splits that you can use. This gives all your 2000 parts sufficient time to recover and be ready to get the crap beaten out of them again. In addition, every 2-3 months give yourself a full week off. Don't worry, all your hard-won gains won't disappear in such a short time, and when it's time to get back into it, you will leap once more into the breach with newfound vigor. Rest is not confined to merely abstaining from working out three times a day.
Sleep is also fundamental to fitness success.
Yeah, I know, it sort of seems like a waste of time to just lie there for eight hours a night, but your body does it for a reason. You might find that after a few nights of crappy sleep that your performance in the gym is impaired. Your immune system will also be compromised with a lack of rest, meaning that whatever gross viruses are smeared on the machines and floating happily in the humidity of the locker room will be more eagerly accepted by your exhausted and apathetic body. Once again, as Sgt. If you work out hard, make sure you rest just as enthusiastically.