We are called to be salt and light in a dark world. It is wise to pray for the Lord to lead people to you (or lead you to others). Also, our day-to-day actions can be a witness to others of our love for the Lord. We can touch others with the smallest deeds. You can hold the doors for people, smile at folks and just be kind to people and send up a quick prayer for them. You may never fully realize the impact of your prayers this side of heaven, but the Lord most certaintly hears you! We can touch others by being obidient to Christ (this is hard sometimes) but honestly people don't want to hear what you say, until they see what you do!
I know the other day I was doing my makeup and I was thinking as Christians "our deeds should out perform our words". Of course, this is in keeping with the saying "actions speak louder than words" and it sounds cliche, but if you mediate on that there's so much you can extract from it.
We as Christians need to learn to do things in love. We may encounter people that are living contrary to our beliefs but we have to deal with them in love; not look down on anyone or condemn them to hell. I respect people and their decisions but I pray for them as well that they may fulfill the Lord's purpose on this earth. We are all here to prepare for eternity, the most profound prayer is to pray for the salvation of others. If the opportunity presents itself and the person is receptive, then we can tell them of the love of Jesus Christ and what he did for them. We can plant the seed and let the Holy Sprit cultivate it.
Pray everyday for an opportunity to touch another person positively. Remember the same Lord that forgets our sins (when we sincerely repent) remembers our kindness to others. A cup of cold water is priceless if your heart is right. The Lord will honor 2 pennies you give with a right heart more than 2 million with a wrong one. We worship a good (GREAT) God and He is watching!