With a H/T to Eric Hudson, here’s a nice article about the “spacing effect” by Nick Soderstrom. If you’re in a hurry, here’s a quick synopsis (but come back later to solidify your learning):

There’s a simple, unintuitive way to study smarter. Simply by breaking up study sessions into smaller, manageable chunks and spreading them out over time, a lot more learning will take place. Researchers who study learning and memory call it the “spacing effect,” and it’s an incredibly powerful and easy way to enhance long-term retention.