I have been fighting with problems for nearly 20 years, and now I have got much loot that many skills of solving problems. I think those skills are just like a crate of gold which is very valuable. There are heaps of problems in our life and we need to learn knowledge to solve them. To solve those problems I need to develop many good habits, for example,reviewing what you learned before learn new knowledge. And that can help you digest the knowledge timely.