Use of mnemonics is important: Shabbat 104a
Memory is divinely controlled: Megillah 6b
Knowledge is wealth, and lack of knowledge is poverty: Nedarim 41a
For a Deaf and Mute Person or a Mute Person: Chagigah 3a
Once a mistake is learned, it is hard to un-learn it: Pesachim 112a
Using a drug made from a locust called "Bird of the Vineyard" to increase learning ability: Shabbat 90b
One should only travel to places of learning, and not rely on the reminders of friends or one's own memory: Shabbat 147b
There are 50 levels of understanding: Rosh HaShanah 21b; Nedarim 38a Rage causes one to forget his learning, and to increase in stupidity: Nedarim 22b
Consuming too much can cause difficulty in learning: Nedarim 37b Being in Israel sharpens one's mind: Temurah 29a Wine as an aid to clear thinking: Eruvin 64a
Forgetting
Testimony is forgotten after 60 years: Ketuvot 20b
The power of Forgetting the Dead was created for our own benefit: Pesachim 54b Rage causes one to forget his learning, and to increase in stupidity: Nedarim 22b
The value of reciting one's learning aloud: Eruvin 53a-b
The value of review: Eruvin 53a; Succah 46b; Megillah 18b; Chagigah 9b
Items which are considered to be "On One's Mind," and aren't forgotten
A memory for which a person has been instructed to be a Witness: Ketuvot 20b
Recognizing another Person
Joseph and his brothers not recognizing each other: Ketuvot 27b, Bava Metzia 39b
A disguising beard: Ketuvot 27b, Bava Metzia 39b