Things every Muslim MUST know!

I am talking about the Fard ain.. is it possible to make a list here? Please contribute if you know something that is Fard Ain.. not from your own "guess".

How to make wudu
What are the things that nullify wudu
What causes minor impurity/what to do next
What causes major impurity/what to do next
Al Fatiha (for daily prayers)
How to do the daily obligatory prayers. (alone) (or with imam)

please add if you know

Allah says in the quran in Surah Al-Ma' idah
"O you who have believed, when you rise to [perform] prayer, wash your faces and your forearms to the elbows and wipe over your heads and wash your feet to the ankles. " 5:6

From the above verse its clear that washing the face, forearms to the elbows, wiping head, washing feet are the fard. But Rasoolullah sallallahu alahiwasallam has shown us how should be performed, is recorded in the below hadeeth from Sahih Bukhari as narrated by Amr bin Yahya.

"My father said, "I saw Amr bin Abi Hasan asking 'Abdullah bin Zaid about the ablution of the Prophet. Abdullah bin Zaid asked for an earthenware pot containing water and performed ablution in front of them. He poured water over his hands and washed them thrice. Then he put his (right) hand in the pot and rinsed his mouth and washed his nose by putting water in it and then blowing it out thrice with three handfuls of water Again he put his hand in the water and washed his face thrice. After that he put his hand in the pot and washed his forearms up to the elbows twice and then again put his hand in the water and passed wet hands over his head by bringing them to the front and then to the back and once more he put his hand in the pot and washed his feet (up to the ankles.)"

About things that nullify wudu, imams of the four different madhabs have taught us differently. The common rules among them being, passing gas, answering call of nature, sexual contact.