There are some effective and practical ways we can improve muscle memory. According to Dr. Small, he has a method called :

Look, Snap, Connect

Look - Slow down. Take a second to remember what you have to record in your brain. Really look at the details or listen and process the words being used.

Snap - The brain has a natural ability to remember things visually, so leverage that. Take a mental snapshot of what you've just seen or the exact place some important conversation took place.

Connect - Associate these images, these mental snapshots to a relevant detail related to the situation in present.

Exercise as little as taking a 20min walk daily, minimizes the risk of having Alzheimer's disease later on.

Working out on a day-to-day basis creates a scientific thingy, that is referred, in more common terms, as brain fertilizer, which strengthens the connection between neurons and so improves memory.

This one is a no-brainer. Sleeping is key. Insomnia is the enemy of memory.

If you check the rest of my profile you'll have more details about sleeping cycles and sleep specifically.

Obesity can trigger late-life brain diseases. Dr. Small recommends avoiding processed foods and fast food.

Oxidation is also something that brings wear and tear to the brain, so get some anti-oxidation food into your system such as fish, nuts, and avocados.

Training your brain is the same as working out your biceps or chest.

Dr. Small recomends this exact exercise that will streghten your muscle memory :

Take a piece of paper and a pencil and try writing your first name using your non-dominant hand (i.e., left hand if you are right-handed). Now, take a second pencil and try writing your first name using both hands at the same time. Now, try it with your last name.