1.Medidate-Meditating is arguably the best way to keep your mind in a good state, it will help you grow your mind and relax you internally so that all your interfering thoughts go away.
2.Exercise- "A HEALTHY MIND LIES IN A HEALTHY BODY".
Trust me exercising is one of the best ways to keep your mind and body in shape. Exercising helps relieve all the stress from your mind. It makes sure you dont fall sick. When you fall sick, your mind lowers its thinking capacity which i dont think anyone would prefer.
3.Reading and writing- When you read a book, you get to know a lot, you get to expand your vocabulary, your memory, your concentration ,etc.There are a uncountable benefits of reading a book.(READ HARD BOOKS, not their soft copies).
Writing: You only learn how to express your thoughts when you are habitual in writing.
4.Habits: "DONT RUIN YOUR LIFE BECAUSE OF YOUR FRIENDS"
My friends usually came to my room every friday night and persuaded me to play games on pc with them overnight.Trust me, its not going to make you smart. I used to miss my breakfast and usually woke up tired which ruined my brain and body. You need to know which time suits you and how much sleep you need so that you wake up fresh.
DONT DO ANY SORTS OF ADDICTION.
5.Get a HOBBY: Get a hobby like playing guitar, when u have a passion u will do anything to become better at it.You will know the powers you have and you will get to know where you lie in this world.
6.Don't ask, ANSWER:Sitting and asking questions wont get you smarter, log on to quora, answer queries of the people,read what the world wants to know and what is its answer.
7.Listen to your elders- Trust me, this is by far the best thing you will realize when you start to live an independent life. Follow each and everything your parents tell you, even if it seems very dumb to you, that is correct.
8. Be unique-"Stop copying, start making"
This is the real deal that will make you smarter. When you are given some task in office or school, don't wait for someone to complete it so that you may be able to copy it.Try to do it yourself. Follow this and in sometime you will realize how smart you have become.
AND start brushing from the opposite hand, it will make you smarter in a week.TRUST ME ;-)