The most common terms in Feng Shui are non other than Yin and Yang. Without reading too much into the individual meaning of both terms, they are basically the core principle of contradictory elements in achieving harmony through the balancing of elements in heaven as well as earth. While Yang typically refers to the positive energy, Yin is the complementary opposite and both of them constantly interact and correspond to both good and evil.
When you are applying Feng Shui in your house, the ultimate aim is to have the best orientation to channel the flow of good chi into your house while trying to avoid any of the bad chi that might exist in certain corners of your house. By applying thoroughly in your house, it is literally pointing to the arrangement of the furniture, such as table, chair etc. For example, a Feng Shui master would generally advise you on how to activate the positive energy at certain location in your house by sleeping there, or carrying out what you do on a daily basis in that corner. On the contrary, you will advised to avoid sharp edges of tables and chairs as they are classified to be destructive chi that it will bring you disasters.
Generally, you would want to start with your individual BaZi when you want to practise Feng Shui at home. Basically, there are 4 good directions and 4 bad directions for each individual. By knowing your own BaZi, you will be able to determine how you can practise Feng Shui in your house. For example, you will be able to tap the best conditions of Feng Shui for you to know when to move in your house, when to start renovation, what is the best direction for your main door to channel the best chi that suits you and so on.
Anyway, for a beginner in Feng Shui, it is advisable to hire an expert to help you carry out a thorough analysis of your house before changing anything. One must keep in mind that the corect application of Feng Shui will bring you good luck, but if you activate the wrong energy, it could bring you bad luck or even land you in absolute disaster which means death.