A habit is something that you do often or regularly almost without thinking, especially something that is hard to stop doing.
If you have good habits, you will be succeed for your study. for example, you focused on classes and made most of your time, finished your homework by you own. There are good habits of how to study.
Also have life habits, including the healthy diet, exercise on time and have good enough sleep.
Only have above habits, you can have strong body, and your study will be better, because of having a good body can bring your good spirits.
Finally, a good habit, will bring you a successful life.