If a person is not worth their word, then what is their worth? If their actions do not match their words, then what? We all know someone like that; all talk, no action. To earn success, focus on what you can do to ensure that all the things you say you are going to do get done.
This advice from Elliot Zovighian comes with four categories of effort:
Read more of Elliot's thoughts on this matter: http://informationanthology.net/CareerMentor/Success-Through-Action.html.