1. 'Nor' is kind of a formal word, and not used very often in that type of situation. That being said, I completely understood what you said and it's not incorrect. If I was saying it, I would say 'I don't want to go to your house tomorrow, and I don't want to go to your friends, either.' 2. Mischevious is good. You might also say the puppy is bad, or that the puppy is naughty. Sassy has more to do with attitude, or backtalking. I'm guessing the puppy isn't doing that. 3. Yes, I hear people say things like this all the time. It's a common joke. Slightly offensive to the woman, however. 4. This is perfect the way you wrote it. The only thing that might be different, if you were speaking rather than writing, would be that you would probably leave the last 'you shoul' out. 'You are being really foolish; sign up already!'

'I'm making up' would mean something other than applying makeup to ones face. It would usually be followed with a description of what you are making up, as in, the bed. If you are trying to say you are putting makeup on your face, don't say it that way because I'm not entirely sure people would understand what you are meaning.

Either works, however, a diary usually is kept daily, with a shorter amount of writing which is done every day. A diary is also typically for the span of one calendar year. Journals are a little more open-ended, and, as others have mentioned, could cover a wide array of topics.

It's going to depend on the formality of the paper you are writing and of your professor. In the spoken language, either one is just fine. In a college-level paper, maybe, maybe not. It might be better to use 'relax' or something more along that line, but I also think you can likely get away with including something like that in a paper occasionally. I think my professors would have been fine with it.

Special day

Today is a special day. Today is that the  kind of very rare days of the each year that the weather is perfect. No clouds; just a blue beautiful sky. The sun brighting in to an exactly temperature to keep us warm. Not too hot, not too cold. Just perfect. The wind is blowing softly just to remember  remind us it's still exists. Perfect...

Let's enjoy it!