This mantra is used in conjunction with Lord Ganesh.
vakratunda mahakaya surya koti samaprabha
nirvighnam kurume deva sarva karyeshu sarvada
O mighty lord who posses the curved trunk (vakratunda) and holy divine with mighty physique (mahakaya), Praise to thy who glitter like a zillion burning star like sun (surya koti) yet who bestows bliss to every body (samaprabha). Hail to the God of million Gods (kurume deva) ; help me fight all my hindrance with faith that you will be there to protect me (nirvighnam) like you have been guiding me always (sarva) and I have faith in you my Lord that you will be protecting me from all the evil forever and ever (karyeshu sarvada).