I just skimmed, so not sure if this was mentioned.

It's pretty basic, but BE FAIR. It goes a LONG way and is (sometimes) hard to clock.

I was offered something in my contract, and I misread the offer (not because it wasn't clear, I literally just skipped over a couple of words). Subsequently, I continued on with negotiations and never mentioned it as a concern.

It wasn't detrimental to my offer, and I knew I'd be fine with accepting that term, but it was sort of an annoying term. I knew if I went back to it after the 3rd round of negotiations and negotiated it, then it just wasn't fair. I later told my boss about it and he appreciated it a lot. I have an amazing and fair relationship with my boss.