These are Ramams 13 principles of faith, it is one very good guideline to Judaism personally I had trouble with number 5. But know I see it in a new light.
I thank http://www.jewfaq.org/m/beliefs.htm for showing me this.
G-d is one and unique
G-d is incorporeal
G-d is eternal
Prayer is to be directed to G-d alone and to no other
The words of the prophets are true
Moses' prophecies are true, and Moses was the greatest of the prophets
The Written Torah (first 5 books of the Bible) and Oral Torah (teachings now contained in the Talmud and other writings) were given to Moses
There will be no other Torah
G-d knows the thoughts and deeds of men
G-d will reward the good and punish the wicked
The Messiah will come
The dead will be resurrected
When it says G-D it means Adonai or whatever name you wish to call God, Adonai is what I call god meaning my Lord.
Who was Ramam?
Briefly Ramam was Rabbi Moshe Ben Maimon, he was a great medieval scholar and Rabbi, his name (Ramam) is an acronym (RMBM)