My new loose schedule really is working, got everything done 20 minutes before 1pm (which was my self-imposed deadline).
My old, detailed schedules never worked. I would define a time to start, several breaks and their durations, and a time to finish everything. Now I only have a starting and ending time, and if I don't get it all done in the morning I have enough time during the rest of the day to make up for it. The only hard part was changing from going to bed at 3~4 am to 1am, so that I could do everything in the morning.
The only problem I was trying to solve was lack of time for going out shopping and stuff like that, because I was studying throughout the whole day and I couldn't do neither of these things at night.