Yes, this is a repeated question and has been answered many times. If you already know about it why you ask again this question? You can get the answer by using the "search feature" or take a look at some threads.

The answer must be varied since it depends on the personal purpose. However, the main purpose must be for money although some gamblers deny it by saying "for fun". 

If you are bored, you must do these :
- Take a vacation
- Go outside with your friends
- Play games   

What for? A professional gambler mustn't do this.