I just failed three 4th year physics courses (classical mechanics, QM and condensed matter). The reason for failure has been a serious lack of discipline. I have had a piss-poor work ethic over the past 8 months, regularly tanking problem sets and having a generally jaded attitude toward my studies. I don't think the underlying cause is burnout or disillusionment - I'm still very interested in learning the theories. Yet I was just unwilling to put in even a tenth of the work my peers put into their studies. Assuming I can rid myself of this destructive attitude and show a redeeming performance from now on, is it still possible for me to make it to the Holy Land otherwise known as a PhD program (well, Masters first)? Or will most universities tell me "three strikes and you're out"? Alternatively, what would you recommend I do? My primary interest is still physics, but it just might be too little too late. I have read earlier threads about 1-fail successes, but three is really pushing it.