Predictive Astrology, Timing Techniques, and Astrological Practice. This archival document is a one-page instructional guide titled “PROGRESSIONS, SOLAR ARCS, AND TRANSITS” by Marion D. March. March synthesizes the core operational differences between secondary progressions, solar arc directions, and transits. She defines transits as external environmental forces, secondary progressions as shifts in internal consciousness and attitude, and solar arcs as hybrid tools reflecting both psychological shifts and timing events. The sheet covers practical calculation guidelines, including a strict $1^\circ$ orb for progressions, checking critical $0^\circ$ and $29^\circ$ degrees, evaluating sign and house shifts, and prioritizing aspects formed between progressed planets and the natal chart over progressed-to-progressed aspects. Additionally, March details the activation of natal configurations (such as a natal T-Square resolving into a progressed Grand Cross) and explains the duration and impact of transits.