Practise the chunking method which involves breaking up a large amount of information into simpler, logical parts that are simple to understand and memorise.
Drawing is another helpful way to memorise information. You can create images mentally and connect them with the information you study.
Concept mapping, graphs and illustrations are simple learning techniques that make information easier to understand and recall over the long term.
Using mnemonics is one of the good ways to memorise information for the long-term.
Writing down the concepts is more efficient than learning them orally.
When you write something down, you concentrate more on the important details, which are retained in memory for longer.
Applying a spaced repetition system with your own physical flashcards will help you to recall information for the long term.
Finally, the best way to remember something for the long-term is to teach it to someone else.