1_Reading books: Choosing the literature, science or the job professional books, make your brain works more active. Finding a novel or a comic before you go business or holiday, because it makes you feel comfortable, so you don't notice the things happen around.
Reading books increases you awareness and vocabulary. Reading usually, then you will be surprised of the information you get and more surprised when you recognized that you're talkative, but you never know before.
2_Taking a course: Let's learn something new, for example, taking a cooking class, arranging flowers class or painting .etc... You will face with challenges on your own because you have to absorb notions, informations and ideas, and keep the most helpful notions when your brain is working.
3_Studying languages: Listening to the tape and have a meeting with a girl who you can talk the language you learn. Otherwise watching TV as a habit, you should watch a film has subtitle.
You need to know that studying foreign languages makes your brain flexible, keen, help you shorten aged thinking process. On the other hand, it can help you talk with foreigners.
4_Running: Increasing oxygen in your body and brain. You will feel comfortable and freely.
5_Playing golf: Let's spend some time to play golf with fresh and cool sight. This is the group sport both help you relax and encourage your mind.
6_Practicing Yoga: You can be surprised of difficultes of Yoga. Although Yoga require that you have to concentrate, it bring you calm and reduces stress.
7_Playing Billiards: Concentrating on a moment makes you more keen.
8_Playing games: Inviting your friends to play a game, like chess... Besides, society activities make you more flexible. Because at that time, you will have to use your memories logical thinking.
9_Buying daily newspaper: The informations you get everyday will be stored in your "hardware". Excitement of thinking will help you improve your comprehension and awareness.
10_Learning to play an instrument: Like guitar, piano, organ... It will encourage your mind.
11_Playing Crosswords: Helping you improve your experiences and vocabulary.
12_Discussion: A discussion will make your mind ardent. As long as you try not to digress the issue become an argument, you will practice quick-minded, keen, logical and creative. Convincing capacity is a good condition for your works and makes your relationship more solid.
Good luck....
