The UpaSamhara (उपसंहार means "epilogue") of "Shreemad-Bhagavatam"'s 63th Chapter (Song X) is very interesting, because it tells that a bhakta meditating on the Battle between Bhagavan Shree Krishna and Shankara will never encounter defeats and losses, to be more accurate, never meet पराजय (parAjaya), which can mean either defeat (in fights) or failure in more extended sense (at business, public speaking and etc):
य एवं कृष्णविजयं शङ्करेण च संयुगम्
संस्मरेत्प्रातरुत्थाय न तस्य स्यात्पराजयः
ya evaM kR^iShNavijayaM sha~NkareNa cha saMyugam
saMsmaretprAtarutthAya na tasya syAtparAjayaH
Translation: "He who rising early at dawn, recalls and contemplates on the story of combat between Bhagavan Shree Krishna and god Shankara and Lord Krishna subsequent final triumph, will never meet any defeat in life".
On The Image: OM VishnuPad Nimbarka Maha Acharya, Who is considered to be The Manifestation of Shree Sudarshana-Chakra - http://guruvesaranam.com/nimbarkacharya.html