Etiquettes

Q: What are the adaab of passing wind in Islam?

Q: When someone does good to you, is it Sunnah to say:

1. Jazakallah
2. Jazak Allah Khair
3. Or Jazak Allah Khayran?

What was the practise of Prophet Sallallahu alaihi wasallam and the Sahaba R.A, please provide reference?

Q:

1. If we have to spit we are ordered to spit on the left side but we are also ordered not to spit in the direction of qiblah. What is the ruling when we are walking and the qiblah is to our left? Can we spit to the left in that case?
2. How to spit in a place where we don't know the direction of the qibla. Can we spit to the left in that case?

Q: When a person is sneezing multiple times should alhamdulillah be recited after each sneeze and should others reply as many times as is sneezed, or after 3 times should they stop?

Q: Can we send around unconfirmed news? What does Islam actually teach us about this matter? Explain from Quran and Hadith with reference.

Q: What exactly does it mean when we are advised not to concern ourselves with that which does not concern you? For eg. my husband is going somewhere and I ask him where he is going to?and why? etc. Am I wrong to be asking questions? How do I prevent myself from bothering over useless issues like these?