memory is the mechanism that's are able to store ,recall and retain information.
The following techniques helps in memory improvement
■eat diet that boost the brain-
good rich in omega-3 and vitamin B .omega-3 fatty acid helps in blood circulation .
•food rich in magnesium are also important side they helps in transmission of signal to the brain .
•choline in vegetable helps in building new brain cells . 
■get enough sleep-
sleep is the best form of rest.
sleeping helps the brain to function properly .
adults should sleep atleast 8 hours a day . 
■participate in exercise -
exercise enhances the flow of oxygen to the brain .exercise helps the brain to function properly and release chemicals that enhances mood overall.
■learn meditation -
mindful meditation helps the brain to function properly no to divert to certain negative Neuro pathway.
meditation reduces stress and helps the brain to function properly.
■stay hydrated -
taking enough water into our body makes the brain to function properly.
taking fruit juice is good as well since it contains polyphenol which helps in building new brain cells .
■learn somthing new -
learning new things stimulate different segments of the brain and aids making new Neuro pathways. for examples learning a new language helps in cognitive improvement .
■REDUCE STRESS-
chronic stress is very harmful to the brain.
it damaged hipocampus which is part of the brain that retrieve old information and form new ones .