How to study well and get good results in exams?

Organization is one way to save time and frustration

Be sure to have an agenda book or other homework notebook to record daily assignments. 
Write the date and list each subject that you have for homework. 
Copy down the page numbers, item numbers or special directions the teacher may give.
It also helps to have a small monthly calendar to record up-coming tests, projects, reports, etc. so you can anticipate and prepare for them ahead of time.
A pocket homework folder is another good organizational tool.

First, figure out a schedule that works for you. 
Some students like a snack and “fun” time when they get home from school. THEN they study.
Some students like to study first and get it done. THEN they have time to play or watch a favorite TV show or read a favourite book. 
Which do you like best? If you do like the break first, be sure that it is only about 30 minutes. Then start your homework. Whichever you decide, work about 30 minutes and then take a 5-10 minute break. Get up, walk around, get a snack, talk with someone in your family, or play with your pet. Then go back to your homework. 

Another choice you have to make is which homework you like to start first. Some like to do the easiest first; others like to do the hardest first while you are fresh and then do the easiest later when you are getting tired. Decide which works best for you.

A good strategy is SQR3, Survey, Question, Read, Recite, Review. When you read a chapter in a textbook, especially when you are studying for a test, have a very small pad of sticky notes handy.

First, SURVEY means to look through the pages of the chapter. Notice the pictures and captions, the words in bold, italicized or underlined print. That way you are getting familiar with what you are about to read; you are connecting it with what you already know. That helps you remember what you read. 
Second, QUESTION means to flip to the questions at the end of the chapter. Read those. Those are the most important facts. It helps you learn what information you are looking for. 

Then, as you READ, when you run across the answer to one of the questions, put a little sticky note by the answer. It helps you find it later if you have to write the answers to the questions and in your REVIEW for a test, it acts as a flag if you can’t remember the answer for the question. After READing the text, go back to the questions and see if you can RECITE or answer the questions without looking. If you can and you are sure of the answers, WAY TO GO! You know those! If there are some that are hard, check your “flags” and find the correct answer. That is the REVIEW. You know those are hardest for you and need more practice.