how can let me be more clever?

Your topic is already a grammatical mistake.
It should be 'how can I become clever', 'how can I improve my English' or 'what is the key to the success in learning English' ^^
You can read more books
Eg.
1) Big Nate series (the not comic version)-> with funny pictures
2) My Weird School series -> hilarious books about a boy who hates school
3) Geronimo Stilton's English books-> full of adventurous stories and colorful pictures
You can also watch more films
Eg.
1) Back to the future -> a story about the past and the future of a boy
2) Nanny McPhee -> one which mentions the battle between the Nanny who possess magical power and a Buick of pesky children
3) Indiana Jones -> a funny one about the adventure of saving the powerful stone

These are the efficient ways that I use to learn better English. Don't worry, it is never too late to change. My English before is not good as well, but now it has become a lot better ^^ Hope that my piece of advice would be accepted XD

2013-10-07 19:44:15 補充：
Sorry, non- comic ^^"

2013-10-07 19:44:50 補充：
Sorry, a bunch of pesky children ^^"

1. Do more readings. If they are in English, mark down the vocabularies and write them down in a notebook for later reviewing.
2. Listen to the CNN channels to keep yourself posted with what's happening around the world. A lot of news information can keep yourself alert and have a stronger sense of EQ.
3. Surf the Internet for useful information pertaining to the cultures of different countries, so you could be more aware of the other races in the world.
4. When we interact with people, we might have said something wrong unintentionally. Write a journal of your daily events, and try to think them over and see if you can make any improvement of it.

You can read more book that about Brain Storm and do some difficult math question.

read more books and hardworking is ok
study more
if you need to recite you need to read more!