Tired and wasting too much time on thinking? How many days have you though, "I can write that paper within 2 hours", and then failed to complete it on time? How often have you given a promise to plan your work and finish ahead of the due date? If you can not schedule your work and use time effectively, apply any of the famous techniques to organize your work. Being so busy as a student, you should manage to do everything needed within the set deadline. Don't get lost with all those tasks, find a way to succeed with all of them.