There's an interesting balancing act this month when it comes to dealing with close colleagues, business partners and potential investors. December begins with the Sun in your 8th House of Shared Resources, where the roles that others play in your professional life become more important. The challenge is to stretch your values and expectations of how alliances can work. Instead of resisting the big ideas of those around you, see if you can find value in what they're saying.
Of course, there is a chance that some of what you hear is unrealistic. Using your common sense, but combining it with an open mind, will allow you to avoid mistakes without missing out on opportunities.
Your sociable ruling planet Venus enters Sagittarius on December 15, just two days after the New Moon in this outgoing sign, which continues to attract individuals who are more ready to take risks than you are. Be especially careful on December 15-16, when Venus slides into a slippery square with dreamy Neptune. Imagination can be a professional asset, but the likelihood of being taken in by someone else's fantasy is strong then.
Fortunately, active Mars supplies support through December 25, as it's in fellow Earth sign Capricorn and your visionary 9th House of Travel. This is favorable for pursuing professional education or doing business with people in faraway places.
The Sun moves into well-organized Capricorn on December 21, but it runs into tense aspects with volatile Uranus on December 25 and provocative Pluto on December 30. These transits can spring surprises and spur conflict with authority figures, requiring a dash of detachment to avoid trouble.