how can we can increase our ability in thinking

To improve thinking, you have to think. Think and think and think. Think about everything. Even the most simplest thing

read books, as in all kinds of books. Eat the right food that will help your brain function well. Have a proper sleep and don't stay up late at night

you can sharpen your mind through some pain. Like you build muscles doing those work outs. It could be solving problems, whatever that attracts you, mathematical or otherwise, it has to have some of those exercises.

As for me, I just like it when I am happy or feel light. Information are all around. I guess if we are healthy mentally, we can easily learn what to do with those info. There's nothing like being worried or unhealthy feeling confused, depressed or sleepy.

Just studying every day guys. You can reading your favourite books or newspaper and magazine, watching news, and more. Thanks

to increase the thinking just think think think think buddy.

think allot ........
think allot.......
just think and think......

When you FOCUS on learning something it increases your abilities. Example: Wheel of fortune on TV. Starting from scratch, I would always beat my sister at guessing the puzzle. Always. She started to focus, study, and watch it all the time. Guess who wins now?? She's a pro!!

read a lot, whether books, magazines, newspapers, internet articles, just read whatever interests you and keep reading. the more you read, the better you read, as well as the faster you read and the more you know.

Do you mean creative thinking, or critical thinking? There are exercises that will help with both.
Overall, I'd say reading and studying does more good than anything else. Pick a subject each day that is new to you. You can use a news article, or a dictionary, anything that will give you ideas. Then go look it up in an encycl or on the internet. Find out things you didn't know about that subject. Do it every day, even if it's just a word you didn't know.

For critical thinking, try debating a subject. Make lists of pro and con, or good and bad. for instance, use the color yellow. Make one list of everything you like that's yellow, and why. Then make an opposing list of everything you hate and why. The 'why' is important to the exercise.

For creative thinking, try choosing two nouns that don't go together, like 'netting' and 'nail'. Now write something that contains those two words. It can be a poem, a story, an article - anything. Choose two words every day. Soon you will be dreaming up all kinds of scenarios with your two words!

I think a lot of folks feel like you do, but simply have trouble getting started. Giving yourself a subject or a title may be all that's needed to get your brain working.