Examine your role in the failure. Think about the times when you missed a few classes or the times when you did poorly on your weekly book analyses for the class. Or reflect on the days when you didn't study as often as you should have for certain tests because you thought you could wait until the week before the test to get serious about it.
Look at your time management skills. Ask yourself if you procrastinated too much on your presentations during the semester and as a result you were unprepared and it showed in your work. Find new ways of managing your schedule. For example, if there's a paper that's due in a month, don't wait until two weeks before the due date to gather and organize research.
Don't beat yourself up. Failing certain courses happens to many college students, and it doesn't mean you're not capable of doing the work. Maybe that particular semester was tougher than most semesters you've had and you struggled to pass. Look at this failure as an opportunity to improve yourself academically.
Learn to seek out help. Maybe one reason why you failed was because you thought you could get through the course with little help but later found out that you were overwhelmed with the assignments and couldn't understand what the professor meant at times. Your professors and tutors want you to succeed so take advantage of their office hours on campus and e-mail them when necessary.