M mental hosipital dr just did a mri on my brain and found out that i only use 10 % of my brain. how to i activate the other 90%?

personal finance?

You don't.  Not all at once.  Think of the brain like a book.  You can use only one page at a time.  Using 10% of your brain at a time is enough; you use the rest at other times.

You are LYING on all counts.

Mental hospitals DO NOT perform MRIs.

The MYTH that anyone only uses 10% of there brain is based on entirely debunked claims that wouldn't even SUGGEST that conclusion if the studies actually showed the data claimed.

Shake it, rattle & roll, not too harshly though.  Get those juices flowing - exercise helps.  Brain puzzles, studying something difficult to grasp.  Keep the brain active, just like the body.  Don't let it get old.

This is a common myth, you are using 100% of your brain and good thing you are cause humans have more brainpower and memory than the best computer in the world.