Identify with your essential nature as a rational being, and learn to prize wisdom and the other virtues as the chief good in life. Continually bring your attention back to your character, actions, and judgement, in the here and now, during any given situation. When dealing with externals, be like a passenger who has temporarily gone ashore on a boat trip, keep one eye on the boat at all times (on yourself, your character) and be prepared at any moment to have to return on board at the call of the captain, i.e., to abandon externals and give your whole attention again to yourself, your own attitudes and actions (Epictetus, Enchiridion, 7).
As if you were walking barefoot and cautious not to tread on something sharp, be mindful continually of your leading faculty (your intellect and volition) and guard against it being harmed (corrupted) by your own foolish actions
(Epictetus, Enchiridion, 38).
All of your attention should focus on the care of your mind
In response to every situation in life, ask yourself what faculty or
virtue nature has given you to best deal with it, e.g., courage, restraint, etc., and continually seek opportunities to exercise these virtues (Epictetus,Enchiridion, 10).