See how many phone calls you can make in hour or a day without caring particularly about the result. A great way to avoid the symptoms of burnout is to link rewards to activity instead of success. One way to kill motivation is to increase your frustration and isolation. You have probably at one time already done this by withdrawing from the people in your life you love. But a great way to create motivation is to give yourself a reinforcement gift that comes as a result of superior effort.
Effort always results in success if it is maintained.
A manager once asked me to speak at his conference after dinner on the last night. As the president was speaking, the manager told me that he was cutting the salespersons' commissions, increasing their quotas, taking out all perks and financial overrides. Motivation doesn't come from a rousing speech or a drug that works for an 8 hour period. It is a by product of your desire to be successful. No other recession has done as much damage to your sales as this one.