You can experiment a lot. One of the most personal development programs on the market—Holosync—goes right to Delta and Epsilon the first time you use it. The Delta state is a state where a lot of emotional processing takes place, regardless of how deep you subjectively go. You can reach a certain state deeply within your brain (around the brain stem, which is where the effect of binaural beats mainly take place) and remain ‘awake’ in the other parts, and still get similar benefits on your cognitive system.
One option is to exercise all brainwave frequency bands—by using one audio each day. That way, you will notice that you are able to reach flow states and other new states in your everyday life.
Another option is to focus on the depth of the state—thereby mimicking a meditation practice using the audios. For this, I suggest you simply start using the Delta audio every day until you feel that your brain follows the entrainment fairly well. In the beginning, it is normal to reach a state of hypnagogia (where you are half-asleep) or even fall asleep completely. This means it is working. You may also notice effects on your dreams at night. Exactly the same that happens when you start to practice advanced meditation techniques. Once you feel that you can reach the Delta state, add the Epsilon track every day, right after listening to Delta. The Delta audio will act as a catalyst for the Epsilon track.
Experiment! Some people are deficient in certain brainwave frequencies; therefore, using these fields is very personal, so you will have to experiment and see what works for you…