Nothing particularly motivating you today? Take charge. In between spikes, why don't you get to work on bolstering up those dreadful downward spikes? Bring up your low levels so that nobody ever knows you're having a bad day. Daily lighten your load of guilt by chipping away at your nemeses. Then treat yourself with some challenging musical entertainment.
There will always be spikes, but you want them to be more frequent and less deep! Your output depends upon your input. Feed yourself.