I owe a huge debt of gratitude to Hilary Barrett, the person behind the Online Clarity website, for deepening my own knowledge and practice of I Ching divination. Her work has also been a big influence to me in creating the I Ching Reading's Journal. So it goes without saying that I whole heartedly recommend you take a look at her website in general, and her advanced correspondence course in particular.
Her website has an excellent section on learning the I Ching which, in addition to the provision of the basics, also includes information about some advanced topics such as the Steps of Change, Patterns of Change, and the Hexagrams of Context. All these are included in the I Ching Reading's Journal - they have there own tab in the HEXAGRAM BOX of the MAIN READINGS SCREEN. Her advanced course also covers these hexagram categories, going into more detail about how the diviner may use them in practice. The course provides some fascinating tips on how to understand and work with changing lines, and how to work with readings without any. There are also some suggestions for dealing with readings where there are multiple changing line too. The last two lessons in the course provides some really useful suggestions for your own practice of I Ching divination - including of course, keeping and using a paper or computer Journal to record your readings.
Personally, one of the things that I like best about Hilary's work is the importance she places in "unpacking" the meaning behind the images used in the text of the I Ching; and then contemplating how this meaning applies to the situation that we are enquiring about. Asking yourself, for example, what or who the 'Changing Tiger' represents in 49.5 or the 'young fool' in hexagram 4. Through looking closely at each word in the I Ching text and questioning what it could mean in a particular reading, I have experienced a deep satisfying understanding of what a hexagram could be indicating. This method is pretty central to Hilary's work, and crops up again and again in her website, e-books and courses. She has, in fact, produced an e-book called 'Words of Change' which examines the most common and significant words and phrases that occur in the hexagram text and lines (The original Zhouyi) of the I Ching. Also, her advanced I Ching course comes with a reference ebook dealing with the same subject but in a different manner and with different material. This is why I have included the original Chinese Zhouyi text in the I Ching Readings Journal. Because you can search and list all your readings which are associated with a hexagram that contains a particular Chinese character in its text, you can deepen your understanding of what that text means by referring to your Background Notes, Thoughts and Developments that you have recorded over time in your journal.
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There is a great deal more about Online Clarity than what I have mentioned above. There is for example, an I Ching Community forum, a fascinating blog, personal I Ching mentoring, as well as having your own personal readings done by Hilary. So if you have not already visited her website, you may well want to take a look at www.onlineclarity.co.uk.