Estelle Daniels' book taught me much of what I know about electional astrology. This webpage and I are greatly indebted to her work. Thanks, Estelle! (For her website, see the Astrology Links page.)
One of astrology's most practical, everyday uses is in helping to pick the right time to do something. Whether it's getting married, moving, changing jobs, or having surgery, astrology can show what's afoot in the heavens for the day and time in question. The official name for this is electional astrology, which means that someone has elected to perform an action and wants to find the most favorable time to do it, astrologically speaking.
The biggest factor in timing is the Moon -- which phase it's in, which sign it's in, the aspects it's making to other planets, and whether or not it's void-of-course (in celestial terms, just hanging out and being spacy). The reason why is that the Moon moves very quickly, and therefore its influence on us also changes quickly, from day to day. Other planets' positions may also be important for timing, depending on what you're planning to do. If it involves communication, see where Mercury is. If it's a big social event, Venus' position will be influential. For hard work and physical energy, look at Mars' position.
ASTROLOGICAL TOOLS FOR MAGICK WORKERS
The most basic tool is a good astrological calendar, such as Jim Maynard's Celestial Influences, or most of Llewellyn's Astrological Calendar. Each month of these calendars focuses on one Zodiac sign; contains an ephemeris, or table of planetary movements, for that month; and lists planetary aspects for each day, and the time that they're exact. A good calendar will also indicate which sign the Moon is in each day, when the Moon goes void-of-course (the time before it changes signs, and makes no further aspects to other planets before the sign change), and when it enters the next sign. It should also include a basic astrological almanac, which lists the meanings of signs, planets, houses, and planetary aspects; astronomical phenomena such as eclipses and meteor showers; and a guide to planting by the Moon.
The other basic tool is -- YOU. In particular,
your awareness of how energies ebb, flow, and change character as the Moon moves
through its phases, as planets change sign or go retrograde, and so forth. It's
worth going through one Moon cycle, preferably New Moon to New Moon, noting
what energies you sense as the Moon changes sign, and as it grows full and diminishes.
You can extend this exercise and go through an entire year, seeing how the Full
and New Moons differ as they advance through the Zodiac, a month at a time.
And to take this even further, if you've had your birth chart cast, you can
see where these lunations -- New and Full Moons -- fall in your own chart, and
how they influence your life, particularly by house (one of 12 chart sections).
If the New or Full Moon makes a close aspect to a natal planet, you'll find
that planet's energies are awakened, particularly in the area of life represented
by the house the planet falls in.