This point should run through the whole writing process, but it should be emphasized in the basic training stage. A clever woman can't cook without rice. No matter how good a writer is, he can't finish writing without writing materials.
So be sure to remember by topic; Some typical materials, such as the background of the times, character identification, fashion of the times, etc. Every aspect should be remembered. The accumulation of materials, the teacher can only do guidance, to find their own.
The accumulated materials should pay attention to three points: one is typical, the other is accurate, and the third is memory. Use your brain to remember, not just your notebook. The richer the material, the faster the writing speed.