Did a simple search in the WT Library for words like, "question," "questioning," "doubts/ing,"obey," "understand."
These are listed in order of occurence oldest to newest (up to 2012 as my library is 2012 version)
"If we have love for Jehovah and for the organization of his people we shall not be suspicious, but shall, as the Bible says, 'Believe all things,' all the things that the Watchtower brings out" Qualified to be Ministers (1955) p.156
"Jehovah uses his organization to teach and feed his people. (Matt. 24:45-47) Hence believe without suspicion the truth set forth by the “faithful and discreet slave.” Watchtower 1962 Sep 1 p.524
"In Jehovah's organization it is not necessary to spend a lot of time and energy in research, for there are brothers in the organization who are assigned to that very thing."Watchtower 1967 Jun 1 p.338
"The point is that Christians have implicit trust in their heavenly Father; they do not question what he tells them through his written Word and organization." Watchtower 1974 July 15 p.441
“No matter where we may live on earth, God’s Word continues to serve as a light to our path and a lamp to our roadway as to our conduct and beliefs. (Ps. 119:105) But Jehovah God has also provided his visible organization, his “faithful and discreet slave”,” made up of spirit-anointed ones, to help Christians in all nations to understand and apply properly the Bible in their lives. Unless we are in touch with his channel of communication that God is using, we will not progress along the road to life, no matter how much bible reading we do.” Watchtower 1981 Dec 1 p.27
"Avoid questioning the counsel (doctrine) that is provided by God's visible organization. Some who point out that the organization has had to make some adjustments (to doctrine) before, and so they argue: "This shows that we have to make up our own mind on what to believe." This is independent thinking. It is dangerous!" Watchtower 1983 Jan 15 p.22
"Really, since our Lord has used "the faithful and discreet slave" to convey to us "sayings of everlasting life," why should we ever want to look anywhere else?" Watchtower 1987 Nov 1 p.20
"We also remember that one feature of 'the wisdom from above' is being 'ready to obey.' Due to background and upbringing, some may be more given to independent thinking and self-will than others. Perhaps this is an area where we need to discipline ourselves and 'make our mind over' so that we can perceive more clearly what the 'will of God' is." Watchtower 1987 Feb 1 p.19 (OMG please don’t think for yourselves you sheep!)
"So, if doubts, complaints, or apostasy threaten to contaminate you spiritually, cut them away quickly! (Compare Matthew 5:29, 30.) Get help from the congregation elders." Watchtower 1989 Oct 1 p.18
"First, since "oneness" is to be observed, a mature Christian … does not advocate or insist on personal opinions or harbor private ideas when it comes to Bible understanding." Watchtower 2001 Aug 1 p.14
"However, we cannot hope to acquire a good relationship with Jehovah if we ignore those whom Jesus has appointed to care for his belongings. Without the assistance of “the faithful and discreet slave,” we would neither understand the full import of what we read in God’s Word nor know how to apply it." Examining the Scriptures Daily 2012 Mar 4
CONCLUSION
Do’s: Believe all things from WT, put implicit trust in WT, be ready to obey WT, cut away all doubts.
Don’ts: Don’t be suspicious of WT, don’t spend much time researching WT, do not question WT,don’t think for yourself