Here are some good posts for preachers:

5 Ways to Deepen Your Preaching – Gavin Ortlund (TGC)
Preaching is like a vast mountain, the top of which is hidden by clouds; and the higher I climb, the more it stretches up still higher above me.

6 Ways Not to Preach the Birth of Jesus – Steve Mathewson (TGC)
But there is another challenge awaiting preachers. The Gospel accounts of Jesus’s birth have been overlaid with centuries of exegetical misunderstandings and legendary elaborations.

That Vital Moment in Every Preacher’s Week – Erik Raymond
This is why one of the most important decisions that the preacher will make each week will come on Sunday night before he goes to sleep. He has to be able to go to close his eyes patiently trusting that God will work.