Here is a meditation found at Lent and Beyond. Be sure to check there often to take advantage of their Advent devotionals and prayers.

Preparing for Advent
Stir up our wills, O LORD — Today please, not in the far distant future!
Peter Toon

Excerpt: The weakness of the will of baptized believers in the Christian life of obedience to the Lord Jesus Christ was well recognized by the apostles (see Romans 7-8) and by the bishops and teachers in the Early Church. This is why they called upon all to use the means of grace provided by the Gospel and to pursue sanctification before God. He who knows his own heart well knows that it is prone to lethargy; that it seems always ready to relapse into slumber as if it were satisfied with present attainments in the moral sphere. It needs constantly to be re-charged as it were by heavenly power and prompted to godly action. In fact, at times it needs to be released from servitude to selfish motivation.

The rest of the meditation