the best way to manage time is to keep asking yourself before doing anything that whatever you are about to do is in what ways helpful for your IAS preparation. IAS needs single minded dedication. Get rid of all the distractions to whatever extent possible. If you are married or having some companion without marriage, make sure he/she understands what you fighting for, plays the role of the support during your preparation. Wake up as early as possible and go to bed in time. A sleep of 5 to 6 hours is what you should aim for, and believe this is the time when you very astutely make a time table and stick to it. Discipline is the key to success in IAS like so many important human endeavors.