What Do Jehovah Witness Believe?

My husband is about to become a JW and was actually raised as one. There are many JW on here so I am sure you will get plenty of answers with bible verses. They do not accept blood transfusions. They do keep track of what they do when out in service. Whether or not there is a quota to be met is unknown to me. They worship Jehovah (God) and do not believe in Trinity (that Jesus Christ, God and Holy Spirit are one).