Keeping God's Word: Our Happy Duty

This past Sunday I preached on Psalm 119:1-16 (here is a link to it in case you missed it). We have a joyful duty to live in line with God's Word. It is a joy because we love God. It is duty because God commands it and it takes work to know what he says. Specifically, we ought to memorize and meditate on Scripture. Here are a few resources to encourage, challenge, and help you in this joyful work.

• Here is a link to a quote by Charales Spurgeon on Bleeding Bibline
• Fighter Verses. This is an app produced by Desiring God to help in memorizing and meditating on Scripture. You can find the app on itunes or the google play store. 
• The Topical Memory System by Navigators. When I was in college, this is what I used to memorize a bunch of good verses. 
• Don Whitney has a one page article listing and explaining 17 methods to help you in meditating on Scripture.

Do you have any apps, articles, or practices that you recommend? If so, share them in the comments section.