All of these strategies are interlinked. To do some of them without doing the others won't work. It's important that all of these strategies are carefully implemented as early as possible in the learning program.
All of these strategies will help prevent the learning from being handicapped by negativity. As both a designer and a facilitator of learning, you must be aware of the negative influences that could easily sabotage a learning event. The first task of any learning program is to help participants move beyond their negative notions of learning and replace those notions with more positive ones. If participants are convinced that there is more value in looking at the learning through a positive filter, then they will have a positive learning experience.
All of these ideas built into the beginning of a learning program will prime participants for the learning that is about to take place. Again, there may be some impatience around spending the time on these elements, but the payoff will far exceed the investment. Participants come to a learning program to learn. If we don't do everything in our power to make that happen then we have not done our job.