How to have good study habites
You have to work towards them. Get your homework done in advanced. Don't procrastinate. Don't find excuses. Do the best you can possibly do. Find a good quiet study environment.
As part of good study habits, you need to make sure your homework is done on time. Try to completely understand any of the materials you read rather than cramming some selected points. You can also try using flash cards to improve on your memory.