Make reading a good habit. Held a lot of discussions. The more we get knowledge either from reading or listening, we are also recommended to held discussion. By doing so we would have a broader point of views onto what we have already got. Lots of exercises.
Exercise is a good thing.
This has to be maintained and do not give any excuses of not having time or too tired of a full day work, for not exercising. In facts, if we are exercising diligently, we will eliminate exhaustion and can increase energetic spirits. Therefore, we could increase our perspective of knowledge and become brighter. Do ask questions. There are many unknown things in life, what we knew are limited.