Tapasya means “control of mind, speech and senses”; this definition comes from Bhagwad Gita 17.14, 17.15,17.16.
To be successful in any kind of Endeavour, one needs to have Shraddha (devotion, respect) towards his work. Along with Shraddha one needs Ekagrata which means work towards the
goal with single pointedness (samadhan).

To resolve any conflict one needs Viveka – the ability to discern the difference between the right and the wrong and the ability to make a decision dispassionately (vairagya).
Apart from viveka and vairagya one also needs a clam mind and control over speech and action. Finally forbearance is required to deal with pain that one may suffer due to failures.
Learn how to develop these qualities.