"For it seemed good to the Holy Ghost, and to us, to lay upon you no greater burden than these necessary things; That ye abstain from meats offered to idols, and from blood, and from things strangled, and from fornication: from which if ye keep yourselves, ye shall do well. Fare ye well." Acts 15:28-29

Socially - meats offered to idols
Morally - blood
Ceremonially - things strangled
Spiritually - fornication 

Read Part 1.