Be wary of sermons which promise "4 easy steps for..." or "3 keys to..." Life is complex and it demands that we think hard about some things.
Being simple and choosing to live simply are two very different things.
Listen when you pray
Invite a few Godly friends into your life while you are young. Spend your adult life living in community with these people. Love them and be loved by them. Allow them to challenge you, your spouse, your children and grandchildren.
Remember that Christians worship the Triune Creator not the Bible