Time management is one of the most important skills you will learn.  This skill will be with you throughout all of your learning scenarios not just online learning.  Time management is the single most important factor in getting goals accomplished and a powerful tool in succeeding in any task.
An abbreviated College Board List of Time Management Strategies

Make a "To Do" List Every Day.

• Put things that are most important at the top and do them first. If it's easier, use a planner to track all of your tasks. And don't forget to reward yourself for your accomplishments.

Keep Things in Perspective.

• Setting goals that are unrealistic sets you up for failure. While it's good to set high goals for you, be sure not to overdo it. Set goals that are difficult yet reachable.

 Use Spare Minutes Wisely.

• Get some reading done on the bus ride home from school, for example, and you'll kill two birds with one stone.

Review Your Notes Every Day.

• You'll reinforce what you've learned, so you need less time to study.

Become a Taskmaster.

• Figure out how much free time you have each week. Give yourself a time budget and plan your activities accordingly, use the weekly planner.

Find the Right Time.

• You'll work more efficiently if you figure out when you do your best work. For example, if your brain handles math better in the afternoon, don't wait to do it until late at night.

Get a Good Night's Sleep.

• Running on empty makes the days seem longer and your tasks seem more difficult.

Communicate Your Schedule to Others.

• If phone calls are proving to be a distraction, tell your friends that you take social calls from 7-8 p.m. Post your weekly planner for all to see.

Weekly Planne