This is what I can remember from the top of my head:
The Faithful And Discreet Slave now refers only to the governing body as a collective group. The faithful and discreet slave was appointed in 1919. And the term is now just the Faithful and Discreet Slave - not the Faithful and Discreet Slave Class.
"This generation" that will not pass away before the end comes, now refers to 2 overlapping groups of anointed christians. The first group consists of anointed christians who were anointed on or before 1914. The second group consists of anointed christians who were anointed during the lifetime of any of the anointed members of the first group. The great tribulation is supposed to come before the last member of the second overlapping group dies.
The Presiding Overseer is now called the Coordinator of the Body of Elders (CoBE for short).
The appointment of Elders and Ministerial Servants are now rubber stamped by the Circuit Overseer - not the branch.
The Bood Study is no longer held in private homes. It is now a 30-minute complete congregation meeting called the Congregation Bible Study.
The meaning of the Name Jehovah is no longer limited to God causing himself to become whatever is necessary in any given situation. "He causes to become" has a much broarder application, including him causing to happen, whatever event or circumstances needed to fulfill his purpose. It includes his role as creator, fulfiller of prophecies, etc. Jehovah is the great "All-causer", if you will, causing to happen whatever is necessary to fulfil his purpose.