Do a few things the night before you plan to study, that will help you finish your task the next day. Plan your meals for the next day or week, gas up the car, organize your book bag, etc. How often do we waste time going to an office or store only to find that it is the wrong place or the product is out of stock. Used wisely, the telephone can actually help you manage your time effectively. Avoid noise distractions.
Silence is the best environment of effective study.
Turn off the TV, shut the door, create an environment where you can concentrate. Notice how others misuse your time. Be aware of repeat offenders. Send a clear message if a person is monopolizing your time. This works well with big tasks like term papers.