It's only come up in our game a few times, but I expect it's going to come up during our session tomorrow so it occurred to me to share a few minor house rules I have;

Characters can use any talent that reduces the number of Setback dice added to a check when using the assist action (in place of the normal effects of assisting). Mutliple characters with same talent can stack the effects on top of each other. In addition, multiple characters with Black Market Contacts can "pool" their contacts together once per session.