Use your visual memory
Graphs. Need to memorize some stats? Draw a pie chart to help you compare figures and remember the most significant numbers.
Pictures. Need to remember the fashion of the 1700s? Draw a picture to cement this information in your mind.
Labels. Need to learn the anatomy of cell? Draw a picture and label the parts.
Highlight, circle, underline, or star important details. Reading large chunks of information? Make the important parts stand out.