One of the challenges with an extended job search is that you eventually reach a burn-out point. Sometimes burnout will last a day, other times it will last for much longer. One of the best pieces of advice I received this search is to set a time frame for disappointment. You know it's going to happen so plan for it.
What I mean by that is when you get the rejection call, allow yourself to be depressed for a couple of hours, or even the rest of the day, but then get over it and start looking again.
I allowed myself to have self-pity for the last couple of days. It is now time to FIDO - forget it and drive on.