I put these points at the top of my sermon-prep template to remind myself every week:

• Show that main point of passage relates to Jesus and his saving work
• (1 Cor 1:18) A truly gospel-centred message will not be acceptable in a synagogue or mosque
• Did I proclaim the gospel as the headline news of the sermon, rather than as a “by the way…”?
• Unbelievers are called to repent, believe, and be saved
• Believers are encouraged to abandon their old self, renew their minds, put on the new self in Christ
• Preach simple sermons, so that God’s people can see Christ more clearly and love him more dearly

What’s the general storyline?

Why put blood on the door frame?

Does God know which house has Hebrews?

If he knows, why is the blood needed?

Blood is for whom to see?