There are two things most people would agree:
Treat studying like your job - plan to work a full day everyday and some weekends. Many students believe that they will have a lot of free time in college. The fact is though, that you are a full-time student. The normal time expected for every hour of in-class time is an additional 1–2 hours of work outside of class. So if you are taking 15 hours of credit, you should be spending an additional 15–30 hours per week working on your courses. That totals 30–45 hours per week, and thus the description full-time student. If you are having trouble managing your time or finding time to study, here are some helpful resources.
Having a personal calendar that includes all your assignment and project due dates is a good tool to organize your time and anticipate what is coming. The first week of classes you should receive a syllabus from each instructor, letting you know the approximate dates of assignments, readings projects and tests. Filling those into the calendar will allow you to see what will be more or less busy periods over the semester. You might need to adjust these dates as time goes by because instructors might get ahead or behind in the materials, but you will have an idea of the load in your upcoming week.
Use this worksheet to track your activities for a week. At the end of the week, sit down and review the use of your time. Ask yourself:
Google Calendar - A calendar you can reach from your computer or phone.
Remember the Milk - To do list app that lets you share tasks with others.
Self Control/Cold Turkey - App that allows you to block websites that distract you, for an amount of time you determine, so you can focus on your studies.