you know in order to achieve a particular goal you need to be consistent, it is not really going to be easy but with practice and time we can achieve what we aim for. Teaching your children and allowing them to know what to go for, what to say at a particular time and meaning what they say, is very very good for them; it helps them to know when to set their boundaries, the things they should do and not do, learn how to say no or say yes to certain things and people. so when we inculcate self-discipline in children it's good and it will help them to go a long way in life. Help them to define the meaning of their lives and to be determined to focus on achieving their future purpose.I agree with you @erther. learning or inculcating self-control in us is something that takes time and you needs consistency and focus.