To choose a friend, in general, it must has features to make it friend.
In SFI, I think we should choose friends with whom I can exchange information on TripleClicks or SFI: People who can give me ideas to improve my balance information and vice versa of course, people with whom we can discuss digital commerce astuses through TripleClicks or SFI.
En end, there's a saying that "the friend is in difficult time."