If anyone wants heavily spoiling recount, there's an entry at THAT, by apparently a new contributor, "Nana". Otherwise, have a few notes that are merely slightly spoiling.

• Nakamura climbing the fence was some amazing animation. Wondrous.
• Nano vs. Sasahara (w/ Yukko peeking - hilarity ensues).
• Teacher eating a whale "outside 200nm exclusive fishing zone" was a LOL.
• Nakamura-sensei stalking Nano is so wrong, but just too damn cute.
• OMG, a love triangle! In my Nichijou!! What is this!!!
• It's so overcast that even Sasahara is speechless.
• Wow, is this asshole going to use Mio's money?!
• [I need a relationship diagram. Everyone is everyone's sister.]

One persistent theme of Nichijou is to take something very wrong and then spin it in some amusing or cute way. The moment that the girl with the headband knot (of Igo-soccer club) went to the shooting arcade definitely took the cookie. I think they went overboard there by punishing her with the asshole propreitor. I almost thew up watching it. But it is far from the only case, even in one episode. To begin with we have Nakamura-sensei's stalking. And then Kojirou literally steals Mio's money, too. But he is so amusingly and cutely insane, that I guess we're supposed to forgive him. I do not quite understand what they are trying to tell us by this. That Japan is an awfully brutal place under the thin veneer of civility?

UPDATE: Jonathan Tappan noticed something similar:

The material is as random at the end as it is in the beginning but it is often pretty funny. There is an underlying theme that is made explicit at the end. Life can be incredibly frustrating but it’s the incredibly frustrating things that are the best part. Because (at this point all experienced anime fans will chant in unison) you experience them with your friends!

Except that a few characters had to face the asshattery solo, as I outlined above.