Practicus is a Latin word meaning, "Active".
Your entrance into the Practicus degree is marked by your learning the limitations of the Human Mind. This realization removes much of the excessive influence of the Ego.
You will experience new powers of rationalization and other mental abilities that manifest through the Soul.
In Hermeticism and Spiritual Alchemy, the work of this degree corresponds to the step of Separation.
According to the Kabala, this degree corresponds to Hod (Splendor):
The sphere of the mind’s rationalizing abilities and logic.
Practical skills you must master here include learning to control the element of Air and your intellectual abilities. You must also overcome the natural tendency toward Indecision: Learn to control your thoughts and strengthen your concentration abilities.