The Head of the family gives us life by speaking; He initiates communication. In prayer we speak back to Him. We can't speak about God and ignore Christ; to do so, says John, is to deny God.
In the Divine Service, there exists lively communication; prayer is an essential element. In Acts, we see a model for Christian family prayer life. The apostles "devoted themselves to...the prayers" - specific prayers, prayed together. When we, undeserving sinners, ask God according to His will, He hears us! Ordinary people are able to come before the Emperor of the universe!
What should we pray? For God to guide our families; for the Word to be proclaimed; for unity (preventing silly prayers - wants vs. needs). He says that He hears us; therefore we know that He hears and answers the needs of His family. Talk to Him all the time - don't relegate Him to a two-minute corner of your morning or evening. Your individual and corporate prayers are important to God. Take ample advantage of that.
We were attending a graduation last Sunday and were unable to make it to church. But I think today's sermon makes up for that. :)