Om Gan Ganapataye Namo Namaha, Shree Siddhi Vinayak Namo Namaha I Ashta Vinayak Namo Namaha Ganapati Bappa Moraya ||
This is a mantra from Ganapati Upanishad. One may always use it before beginning a journey, a new course in school, new career or job, or before entering into any new contract or business so that impediments are removed and your endeavor may be crowned with success.
Ganesha mantras are siddhi mantras .When chanted with the proper pranayama (rhythmic breathing) and sincere devotion, they will yield good results. In general, Ganesha mantras will ward off all evil and bless the devotee with abundance, prudence and success. Evil spirits dare not enter the home or the mind of the devotee where Ganesha mantras are recited.