Twos represent duality, balance, choices, interaction, polarity, developing.

Two of Wands - A choice or balance in applying energy. The first steps have been completed, and one must decide where to apply energy from this point on. Control. Dominion.
Two of Cups - Emotional interactions. Balance between opposites. Love.
Two of Swords - Peace (hard won), paece restored, a respite from conflict, a tenuous balance. Compromise.
Two of Pentacles - Balance in practical matters; juggling several tasks on the physical plane (home, work, hobbies, recreation, etc.). Harmonious change.