The general way I try to learn is by having fresh ground coffee and doing the learning as early as possible in the morning after a good night sleep. It is also important to be motivated. No matter how much energy you have if you do not have desire and will to learn Physics and the Talmud and Musar then nothing can help. You need to have the will. But if that essential ingredient is there, then you need coffee. Fresh ground  in the store. You do not need to cook it. You can mix it with water and and egg and drink it with Russian Halvah.

You also need a good night sleep before hand and as much as possible to guard that first hour when you wake up that it should be for learning alone. Nothing else.

[The basic idea in this is that there is an aspect of holiness that comes into one's soul by means of connecting with God's wisdom as revealed in the work of Creation. So there is the idea of learning Torah which includes the work of Creation and the work of the Divine Chariot as defined by the Rishonim like Ibn Pakuda and the Rambam and the Gaon Saadia. [They were aware of mysticism but held that the command to learn the work of creation and the work of the Divine Chariot did not refer to mysticism.]