There is a truism that says you often get what you reward. It is also true that your priorities are obvious by what you frequently talk about. You know a baseball fan because he incessantly talk about his team. You know someone loves food if they watch the food network and talk about recipes. A person who loves cars makes it a point of conversation.
Ultimately, a church that talks about evangelism a lot will send a strong signal that evangelism is important. The pastor who rarely mentions the gospel sends a message that it really isn’t that important. It is not enough to merely talk about it from the pulpit… pastors are supposed to do that.
There needs to be a time every week where believers can talk about evangelism. It might be a small group or a Sunday School class but there must be a scheduled slot every week to converse about evangelism. It would give people a chance to talk about what happened the previous week and what they plan to do the next week. It would provide an opportunity to report back on evangelism and a time for ask others to pray for a planned meeting with an unbeliever.
The bottom line… keep on talking.