R Noach Weinberg (in his 48 ways to wisdom, based on Pirkei Avot 6:6) writes there are five elements to learning Torah well
- constant: use all available "dead time" to study
- consistent: set a goal, commit to carry out the daily activities to reach that goal on the same time, same place and same way, as much as reasonably possible
- continuous: learn without interruption, better an hour straight than two with constant interruptions
- cyclical: review multiple times, constant review is essential for retention
- comprehensive: be hungry for wisdom, define yourself as a learner even if your profession is something else
The gemara has a number of principles for how to learn, many focused on regular and constant review, e.g.,
- Anyone who studies Torah and does not review it is comparable to a person who sows and does not reap (Sanhedrin 99a)
- One who reviews his studies one hundred times is not comparable to one who reviews his studies one hundred and one times (Chagigah
9a)
A number of books were written to apply these principles to learning Torah (with a focus on Talmud), the three I liked best are