You have to try and convince your perspective employers that the position or positions that you are applying for will better your career. Both economically and spiritually, if it is a position in middle management I find it is always good to hear that you are comfortable working between tiers of management.
i always said because i am trainable to do anything
By explaining why you left your previous employment.
You should answer the question honestly and briefly. There is no reason to go into the details on a job application of your leaving a position.
If a job application asks for a reason for leaving, it is best not to lie. However, a vague answer such as "personal reasons" can be acceptable.
Educational reasons
You could list it as personal reasons.
Looking for a shorter commute.
To write an application of leave for a personal reason one must include when the plan on leaving and how long they would like to leave. They must also include details the are comfortable with providing.
In some cases its a merger or acquistion. Its important to have your leaving story prepared when you're asked this question on the phone or face to face. See a site called Careego for some ideas.
Not drawing a salary. I need a good reason to put on application that will not scare off the hiring person.
Simply list them as "current employer" and the reason for not working. i.e., layoff, reduced hours, etc
You need to put on the application that you left job to be at home with your children. No employer would down upon this.
You need to write that you left because you no longer wanted to work for the company. As long as there are a mutual agreement, there is no reason to explain more about it.
If you do not wish to answer honestly, then say something like "you wanted to develop your career and felt the change of job was necessary to your developmental experience".