The most important tools are the Planet/Sign/House phrases and the Full-Cycle Aspect phrases. With these two tools you have all you need to generate a fully customized, individualized, positive, affirmative interpretation of a chart.
There are also articles to help you use those two interpretive guides:
The Detailed Guide to Using the Planet/Sign/House Phrases
The Example of Using the Aspect Phrases.
There are also guides on How to Create a Chart and How to Calculate Aspects.
There's also an article on Why the B.I.D.E. System is Valuable and Why Astrology Doesn't Predict Events.
One final tool available is a Very Special Offer to enable you to have free astrology software and the files needed to Easily use Full-Cycle Aspects.