Islamic Teachings: Disallowed Matters

So I thought of compiling this list of prohibited things, in accordance with the hadeeth of the Prophet (peace and blessings of Allaah be upon him): "Religion is sincere advice (al-deen al-naseehah)," and in the hope that it will be of benefit both to myself and to my Muslim brothers. So I have compiled what information I could from the Qur'aan and from the ahaadeeth classed as saheeh by the scholars who specialize in this field (relying mostly on the reports classed as saheeh by al-'Allaamah Muhammad Naasir al-Deen al-Albaani in his books).