I have found that inviting people I am evangelizing to to come serve with me (usually picking up trash in the neighborhood or volunteering giving out food) really helps them to 1) see me as I try to live my life faithfully and in integrity 2) gives them memories to hold on to as we speak, this seems to let ideas about God sink deeper into the good soil of their hearts and 3) gives them an opportunity to practice doing good works and living life a bit differently. I think it helps some people realize that they can live differently and actually would like to.