Remember you are in this for the long haul, so pace yourself. You may have a tendency to want to keep up a high activity pace or set overly aggressive of goals out of the gate but honestly the worst thing you can do is burn yourself out. If you understand from the beginning it is a marathon and not a sprint, you can make sure you set your pace accordingly. Rome was not built in a day and your project or job won’t be completed in one either. I am not saying you shouldn’t push yourself, because you should, but also take time to breathe and save some reserve for tomorrow. Realize that you need to be at peak performance not only today, but tomorrow and next year and five years down the road and 10 years after that so take the long term view. Everyone including yourself will thank you for this perspective.