This author gives 18 tips on how to memorize more Scripture.
Here’s one of the “tricks:”
2. Pay attention. Sounds obvious, but often ignored. Simply forcing yourself to be aware of what you are reading can help you internalize the words. Repetition will make the mind wander. What you have to do is bring it back.
Check out the others here, but be forewarned: you’ll have to “turn off the TV, unplug your iPod and shut down your computer” to retain more.