Yes, we have to be quite sensitive to what is going on in the mind, because in this practice, especially with contemplation, we have to know when it is time to develop more tranquility and concentration. If there is restlessness being generated just from doing too much contemplation for our personality, then it is very helpful at these times to focus more on the tranquility part of the practice. That is, learning how to have a calming subject of meditation. This is why we encourage you not to contemplate while walking, so that we can let go of the thinking process and have more tranquility. At other times it may be more appropriate to watch the breathing to calm the mind down, so that it then has the tranquility and concentration necessary for deeper reflection.
However, if the restlessness is being generated by our reaction to some of the reflection, it may be that we are touching a point in ourselves of resistance to truth and it may be helpful to investigate into that restlessness at that time. Actually see what hindrance is arising. Is there aversion arising? Is there sadness arising, grief arising because we don't want this to be so? And, depending on what type of reflection we are going into, it can be helpful to use various types of skilful ways to calm that down, but it depends a great deal on which reflection we are doing. So if you find restlessness arising due to one particular type of reflection, it may be helpful for you to ask in the interview how to let that go at that time. At other times, it may be helpful just to calm the mind a little. Or to balance it. Perhaps we are going too excessively into one reflection, without balancing the mind on the other side. Say for instance, a simple example is with the Compassion/Lovingkindness meditation, when we are spending much too long on the Compassion side with not enough time on the Lovingkindness side. So the reflections also need a balancing, to understand when we are getting too tight or too loose.