A habit is a behaviour that has become a natural part of your life. The behaviour is pretty much automated, and that saves a lot of energy.
Energy to do things
It might take a lot of energy to do tasks that have not yet become a habit. The main reason for this is that you have to remember the task and then motivate yourself to do it. This is in contrast to habitual tasks that will be done almost by them selves. We all do many things every day that we do not think a lot about, meaning that we have a lot of habits.
Different kinds of habits
A bad habit can be described as a type of behaviour that rewards you in the short term and that feels very good at that very moment. In the long run it will prevent you from getting what you want. A good habit will instead feel very satisfactory in the long run. As it has become a natural part of your life it might also reward you in the short term.
Think through the advantages
To create a new habit motivation is necessary; otherwise there is a big risk that you give in before the rewards are evident. Before you change anything you should therefore think through what you will gain or lose by creating a new habit.
In Zhineng Qigong we recommend that you practice regularly, that is to adopt the habit of practicing every day.