Thelemites, in general, have a few customs that you might see when interacting with a community in real life. Mostly, in an immediate sense, they are designed to keep you mindful of your pursuit of what Thelemites refer to as "The Great Work". These practices, beyond just being exercises in mindfulness, also have deeper spiritual meaning to some. As such, they often come in the form of rituals.
Saying Will before meals- A short call and response dedicating the energy of a meal toward the accomplishment of the Will. It is, in essence, a simple daily Thelemic Eucharist. This is sometimes adapted as a monologue and performed alone in the absence of other people, or other people who are familiar with the response.
Liber Resh Vel Helios- A Solar Adoration which is performed at Dawn, Noon, Dusk, and Midnight. Liber Resh aligns the individual with the Sun, that is, it keeps them mindful of their own light which is always shining. It is also a mindfulness tool that reminds the individual four times a day to consciously do their Will. It keeps Thelema fresh in their minds and helps maintain focus on The Great Work.