This may seem like a rather strange admonition, but it is absolutely necessary to remind ourselves of its truth. Many people simple do not succeed in the race to riches because they wear themselves out in the first lap or two. Or they accumulate some quick wealth and lose health or life itself and never get to enjoy it. Short sprints in life's long haul are necessary for completetion of the marathon. Pacing oneself, taking breaks, knowing limitations, setting boundaries, and balance are some of the secrets of maximum effectiveness.
P - Practice restraint. Solomon urges us to hold back some effort. Usually it is unproductive, frenzied, thoughtless activities that we need to curtail in order to be more effective.
A - Assign yourself times to work and specific tasks to do. Also assign yourself times for rest, refreshment, and recovery. Assign and follow through. Keep your life in balance.
C - Create spaces for thought, reflection, renewal, and creative thinking. Create space for family. Money is not the most important thing in your life. It is the freedom to pursue what is valuable that makes money attractive. Do not lose that perspective.
E - Excuse yourself from attempts to overload you (by others) or yourself by yourself with good things that rob your energy from the things that are best. Make wise choices.
I also recommend The Power of Full Engagement by Jim Loehr and Tony Schwartz Managing Energy, Not Time, Is the Key to High Performance and Personal Renewal.