The Bible is the living Word that changes lives. And, in the end, success in ministry is changed life . Second, and a close second, is an accountability group. Accountability groups are a tool for men to get beyond news, sports, and weather. Accountability means to give permission to a small group of men to ask you how you are really doing.
Accountability brings objectivity.
Other men are able to help us add to our lives everything God would add and subtract from our lives everything God would subtract. For the mass of unsaved men you need evangelistic meetings. Also, you must offer training to men about how to share their faith. For the mass of cultural Christians you need momentum events to motivate them and discipleship group opportunities to help them move forward. Don't overlook book studies and prayer groups.