If you have a gifted evangelist in your church, ask them to explain why and how they share the Gospel with others.
Analyze how much of what you sing in church actually focuses your attention on God, teaching or reminding you about His nature and purposes.
Consider what "messages" your church leaders send about their belief in your church's future and speak to them about your observations in an encouraging way.
Consider the advantages of a worship service over personal worship.
Ask the senior leader of your church to explain why attending the worship service is important. Discuss the answer with your friends and family. Provide the leader with feedback.
Write down three reasons why you go to the worship service. Invite someone else to do the same and compare notes.
Ask anyone you come across in your church, who seems to have some longer-term tension with another person, to tell you one or more positive things about that person, then encourage them to communicate those to the other person in some way.
Make eye contact and shake hands or greet someone from your church with whom you have had even the slightest relational tension and ask how they are going generally or with one of their specific areas of interest.
Speak out about the positives of a person or current situation (or how things could clearly be worse) when in any negative sounding discussions this week (but then of course work to make the situation better).
Take time before meetings this week (e.g. at meals with your family, a leadership or team meeting, a mentoring appointment, etc.) to think about a celebration point that relates to that individual or group as a whole and then share that point in the meeting.
Make a list of ten reasons for celebration from your life this week (eg. from your work, church, ministry, family and friendships, the Bible, etc.) and share some of those points with at least three people from your church.
Ask your congregation/small group/team/family/friends what unique gift they personally brought to worship this week with which to bless God and encourage the church.