I am reading through Psalm 119 right now and was meditating on verses 9 - 16 about storing His word in my heart (verse 11).
I have heard this verse usually put forth as a command from God, but it occurred to me that this was the author's way of keeping his heart pure. I do try and keep the word in me, but I think I am more prone to cry the last part of verse 10, "let me not wander from your commandments!".
So my prayer is to be disciplined in fixing my eyes and mind and heart on Christ and his words. But that the work would be a desire (verse 16) and not a duty so I will remember it. Then the Holy Spirit will have the tools there to help in time of need.