By guarding it according to your word.
10With my whole heart I seek you;
let me not wander from your commandments!
11I have stored up your word in my heart,
that I might not sin against you.
12Blessed are you, O LORD;
teach me your statutes!
13With my lips I declare
all the rules of your mouth.
14In the way of your testimonies I delight
as much as in all riches.
15I will meditate on your precepts
and fix my eyes on your ways.
16I will delight in your statutes;
I will not forget your word.
The psalmist knows the value to God's word and God's commands. He seeks after God. He wants to know the things of God. He knows to meditate on God's words and his commands. He knows to delight in them. He knows the importance of remembering them. He knows the importance of sharing them with those around him.
I need to make this my prayer as well. I need to think deeply on God's words. I need to treasure his words so much that I have to share them with others. And I need to do this diligently, showing that God is important and that I will not forget his will for me.