Meditation is really important if you want to release negative energy from your body and feel the power of nature. Do meditation every morning and do it on a regular basis. Meditation is a really sophisticated thing, it can change your life and increase your IQ very well so make a plan for every morning meditation and YOGA both.
As you are doing gym for your body like that brain also needs to work out to stay fit and healthy that's why solve a puzzle every day. When you solve problems and puzzles, the brain makes new neural connections and it will enhance your IQ. Challenge your brain by that way your brain become more smarter.
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Travel and Explore New Places
Actually traveling teaches you many things. According to research, every student should travel long once in his or her student life because it gives him or her the whole idea about life. Traveling is a mixture of challenges and it's one of the best ways to release stress. When you explore some new places, your brain become more active that reacts on that so to increase your IQ keep traveling and exploring new places.
Play musical instruments
One of the wisest men in history is Confucius. He is known to have remarked that music gives pleasure to the soul. Playing a musical instrument teaches you how to be patient. It also teaches you how to improve your eye-hand coordination. As a result, your motor skills improve. It takes time and practice to learn how to play an instrument. Thus, you are able to repetitively practice the motor skills and concentration which eventually makes you smarter.