Holy season meditations
The Thelemic "holy season" starts with the Feast for the Supreme Ritual on March 20, and ends with the Third Day of the Writing of the Book of the Law on April 10. This is a span of 22 days, which conveniently enough is also the number of paths on the Tree of Life. Crowley never remarked on this (that I have found, in any case), but modern Thelemites have created a tradition of commemorating the 22 paths of the tree during this period, one path per day. There are a number of ways to do this, some quite involved. I recommend the following approach to those interested in experimenting with this practice.
The idea is to meditate on one of the Tarot trumps on each day, working "backward" through the sequence. So on March 20 you would meditate on the Universe, on March 21, the Aeon, and so on to the Fool on April 10. These meditations can be long or short, with simple or elaborate setup, as suits your own needs and taste. At minimum, I suggest looking intently at the card for several minutes, closing your eyes, letting the imagery of the card play in your mind for several more minutes, and then recording your observations in your diary.
For those of you who use Google Calendar, I have created a calendar of the days with their associated cards, which you can overlay on your personal calendar. I find this helps remind me to keep up the practice.
Best of luck in your Holy Season explorations!