There are many things you can do to increase your memory and improve your cognitive function:

Exercise:

Regular physical exercise has been shown to improve memory function in several ways. Exercise increases blood flow to the brain, which helps deliver oxygen and nutrients that are essential for cognitive function.
Exercise also promotes the growth of new brain cells and enhances the connections between existing cells, which can help improve memory retention and recall.
Additionally, exercise has been shown to reduce stress and anxiety, which can interfere with memory function.

Sleep:

Sleep is critical for memory consolidation, the process by which new information is processed and stored in the brain.
During sleep, the brain processes and consolidates memories, so it's important to get enough restful sleep each night to optimize memory function.
Lack of sleep can impair memory consolidation and lead to forgetfulness.

Mental stimulation:

Engaging in mentally challenging activities such as puzzles, games, or learning a new skill can help stimulate the brain and improve memory function.
These activities help strengthen neural connections in the brain, which can improve memory retention and recall.

A healthy diet:

A balanced diet that includes fruits, vegetables, whole grains, lean proteins, and healthy fats can help improve memory function.
Certain nutrients, such as omega-3 fatty acids and antioxidants, have been shown to have a positive effect on memory. Omega-3 fatty acids are found in foods such as fatty fish, nuts, and seeds, while antioxidants are found in colorful fruits and vegetables.

Stress management:

High levels of stress can interfere with memory function, so it's important to find ways to manage stress through techniques such as mindfulness, meditation, deep breathing, or exercise.
These techniques can help reduce stress and anxiety, which can improve memory function.

Socialization:

Engaging in social activities with others can help stimulate the brain and improve memory function.
Socialization can help reduce stress and promote a sense of well-being, both of which can have a positive effect on memory function.

Mnemonic techniques:

Mnemonic devices are memory aids that help people remember information. Examples of mnemonic devices include acronyms, visualization, or association.
These techniques can help improve memory retention and recall.

In summary, by incorporating these practices into your daily routine, you can improve your memory function and increase your overall cognitive performance. It's important to find the strategies that work best for you, as everyone's brain and memory function is unique.