Walk up to a person on the street and ask them to follow you. If they are like most of us they will simply respond with "no" and others, if polite, may inquire "where to". You respond by saying that you are not sure where you are going, but would like them to follow you anyway.
Think of the questions that start to arise in an interaction like this—who are you, why do you want me to follow you, where are you taking me, what do you want from me?
Following someone blindly takes a lot of trust.
If you do not know where you're going, how do you expect anyone to follow you there? If you cannot explain your mission, your goal, or who you are in a clear and concise manner, how do you expect anyone else to do the same?
With this in mind, walk up to a person on the street and ask them to take your picture. More often than not they will gladly pause whatever they are doing and snap a shot.
Share your mission with others in the most clear way possible and you'll be surprised at who starts following you!