If you like surfing the Internet, you can take time to visit more knowledge forums.
We should also develop the habit of reading more books, which is the best way.
The types of books are preferably some literary magazines, which are not boring;
Website, you can find it as long as you search.
You can watch hundreds of lectures on TV and chat with a tiger. If you want to increase your scientific knowledge, you can watch CCTV's Approaching Science.