If you feel your choice of spiritual reading might pose a real problem for you in this way, it would be best to follow the classic advice for those who struggle with this: to find one confessor or spiritual director, stick with him, and follow his advice not only with regards to matter for confession, but also on spiritual reading, penitential practices and other spiritual exercises. Ask for one book at a time that he recommends, and avoid trying to read a variety of writers on a variety of topics all at the same time.
The monks were each assigned one book from the library as their spiritual reading for Lent by the abbott, and had to finish that before getting another. The Rule of St. Benedict is sound for any life, but for instance for a lay person, some guidance would be needed to adapt his precepts to daily life in the world.
Unless you have some guidance from a good spiritual director, some people such as those who are scrupulous, or new Christians for example, or young adolescents, or people with OCD, should probably not dip into some of the great spiritual classics of earlier eras, that were written in a different time and place (and language) for a different sensibility. All of these, such as Francis de Sales, Ignatius, John of the Cross, big and little Terese are exellent and timeless, but some background in the time and “Catholic culture” in which they were written is necessary to filter some of what they say. Someone who lacks some background in the culture which produced these works and their intended audience, might become lost or confused by some of what they read. Any of the people I have described above should also stay away from non-Catholic writers, or dissident Catholic writers.
I second what others of have said, stay with spiritual writers whose focus is on trust in Divine Providence, mercy, love of God, self and others, and say away from those who write about sin and repentence. Also stick with the advice of your trusted confessor on how to prepare for confession, not on general guides for a general audience. Also work, with his guidance, on service to others and how you can live out your Christian commitment in concrete ways, directed toward others rather than too much inward focus.