Faith is what makes everything work and yet we don't work on increasing it sometimes. I had that problem for a while. I noticed that when we would go contact people in what appeared to be an awkward situation, I would doubt about whether or not the person would listen to us.
This is what faith can do: We were contacting people at a park. On weekends, there tends to be a lot of birthday parties at this park. People will all gather under a pavilion and it makes it hard to approach them. The other day, I saw a group of four people setting up for a birthday party. Three of them were on the phone and the remaining one was sitting there looking at her phone. These people were waiting for more people to show up to the party. I realized that Heavenly Father understood that I was nervous to approach groups of people who appeared to be busy and so I had the faith that if I talked to them they would listen. Well, we walked up to the group and I asked them if they wanted to say a prayer. None of them responded except for the girl who wasn't talking on the phone. We ended up saying a prayer with her and teaching her the Restoration.
Basically, the best way I've found that builds my faith is by recognizing that the thought I'm having is good and acting on it and then relying on God to consecrate that action for good. Being bold enough to say and do what the Spirit tells you to do is what makes us into good missionaries.







