Next time you hear a biblical principle in the sermon which you can readily take and apply in your life, let the preacher know what principle you learnt and how you intend to apply it.
Ask the music team if they enjoy the music in the worship service and also what music most helps them encounter God and why.
Write down three reasons why you go to the worship service. Invite someone else to do the same and compare notes.
Acquire a high quality illustrated story Bible and begin reading it on your own (and with family or friends) purely for the simple enjoyment of the stories of God's journey with his people.
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.