1st lord in the 12 houses
Lord of Tanu Bhava: Self, Body, Personality
Every house has a lord, the planet that rules the sign on its cusp. Wherever that planet sits, it takes the affairs of its own house with it. The 7th lord in the 10th house links marriage to career; the 5th lord in the 9th joins two houses of fortune. Twelve lords in twelve houses make 144 combinations, and each one has its own guide below.
Which planet is the lord depends on your ascendant, so the 7th lord is Venus for an Aries rising and Saturn for a Cancer rising. Find your ascendant first, then read the placements for the houses you care about.
As a rough guide, a lord does well in a Kendra (1, 4, 7, 10) or Trikona (1, 5, 9) and struggles in a Dusthana (6, 8, 12). The exception runs the other way: the lords of the 6th, 8th and 12th placed in any of those three houses form a Vipareeta Raja Yoga, where one difficult house cancels another.
Lord of Tanu Bhava: Self, Body, Personality
Lord of Dhana Bhava: Wealth, Family, Speech
Lord of Sahaja Bhava: Siblings, Courage, Communication
Lord of Sukha Bhava: Mother, Home, Happiness
Lord of Putra Bhava: Children, Creativity, Romance
Lord of Ari Bhava: Health, Enemies, Service
Lord of Kalatra Bhava: Marriage, Partnership, Business
Lord of Ayu Bhava: Death, Transformation, Mystery
Lord of Dharma Bhava: Luck, Father, Religion
Lord of Karma Bhava: Career, Fame, Authority
Lord of Labha Bhava: Gains, Friends, Wishes
Lord of Vyaya Bhava: Loss, Spirituality, Foreign