Sounds like almost everyone on here feels that fatigue sometimes, and I do, too. It might sound odd to hear that, but I don't necessarily have goals now of future optimization, but more like "I'll do research on medical insurance changes at the end of next year" - or - "I'll re-evaluate the mortgage situation after my daughter finishes middle school" - "Research on investments can wait until I actually have the money to start investing monthly"... things like that. Sure, you can optimize everything right this very minute, but I personally have a lot to do every day, and adding things like that in causes me a lot of mental stress, so I have to space that stuff out.
I personally get fatigues because its as if everywhere I go businesses and banks are trying to beat down my brain with the ad nauseum advertising and paperwork. I can't come home from anywhere without some piece of paper in my hand, and I swear, I'm starting to hate paper. Seems businesses are taking advantage of the perceived notion that the economy is way worse than it is, cutting all kinds of unnecessary corners for the consumer. I just decided to stop buying stuff - literally - I like to eat out, but if I order a burrito dinner, and there's nothing with the burrito, it had better be larger than the burrito that comes with rice and beans ... last night I ate at my favorite Mexican restaurant for the last time AND I'll be leaving them an online review today. That's just an example, but I have just become very choosy with where I spend my time and money. Its rare anymore that I feel I have gotten my money's worth and its very tiring.