Here you can find some of the best resources on the web which will assist you to prepare for the placements as well as internships. The content of these resources include but are not limited to case preparations, mock interviews, case competitions, product management concepts and many more. Being in touch with these websites will also provide you with multiple off campus opportunities which you can pursue.
Some motivation for the preparations:
"More than rich, more than happy, more than famous, I want to be great." - Bruce Springsteen