First things first..

PAY ATTENTION yes, this seems obvious but when you are studying you will need to switch from short term memory to long term memory and it is easier and more effective if you are 100% attentive.

Use Study tools!

Use study tools to remember! One study tool is elaborate rehearsal, this is connecting new information to older information that your brain has previously learned.

Practice make perfect

Drill and practicing a statement of fact over and over again is a simple and effective way to study. This will lead to the information to being stored in your long term memory.

Mnemonic Devices

There are so many examples of mnemonic devices and they work!

For example the Order of Operations in math: Please Excuse My Dear Aunt Sally

One last way! TEACH!

By teaching the information to someone you will not only benefit them by you will relearn what you are trying to study!