This rule entails identifying things in similar verses that tie into the name of the surah. If you take into consideration, two similar verses in Surah Israa, the first occurrence of the verse has the word (الناس) which means mankind, and this word shares a letter (س) with the name of the Surah. As compared to the second occurrence of a similar verse in the same surah that does not include the word (الناس).
Identifying the shared letter (س) in the word and in the name of the surah will help the memorizer to make that connection and always remember that this specific wording comes first in the surah.
Example of that is the word {People}:
"And surely We have set forth for mankind in various ways all kinds of similitude in this Quran, but most people would reject everything in respect of it but disbelief." [Al-Israa: 89].
And in Surah Al-Kahf, Allah said:
"And, surely, We have explained in various ways in this Quran for the good of people all manner of similitude, but of all things, man is most contentious." [Al-Kahf: 54].
Think about the difference between the two positions:
Al-Israa: "And surely We have set forth for mankind in various ways all kinds of similitude in this Quran"
Al-Kahf: "And, surely, We have explained in various ways in this Quran for the good of people all manner of similitude"
In Surah Al-Israa, {for people}, and there is a common letter between it and the title of Surah, which is the letter: s, came at the beginning.
This is not as in the second occurrence in Surah Al-Israa, Allah said: "We had explained the truth in this Quran in various ways that they may be admonished, but it only increases them in aversion." [Al- Israa: 65].
Here Allah didn't mention the word {people}.
The source and main material used in preparing the content of this blog is the book, Ways of teaching the noble Qur'aan and memorizing it by Abu Abdrahman, Jamal ibn Ibrahim AlQirsh (طرائق تدريس القرآن الكريم وحفظه).