Here are 3 basic yet very powerful tips to memorize & recall your learnt lessons.
Tip 1. Dring water 15 minutes before you sit to study
Tip 2. While learning lightly touch your tip of index finger to tip of thumb (preferably right hand)
Tip 3. While writing exams keep a silver coin / object in your left hand (if you are a right hand writer), if you are a left hand writer preferably wear a silver ring in index finger of left hand (just before writing your exam)
Derrick Angelsz