Always leave yourself a way out. This was one of the cardinal rules of the Smith System of driving that we were taught in Regina during basic training. Simply put, always make sure that you have a place of safety to move your vehicle into if something unexpected happens.
I chose this topic as it seems that in the past couple of weeks I have run into many practitioners of the opposite view. I often have vehicles that either pace me sitting in my blind spot or directly beside me. They remain there even when I slow down to try and open up space around me! I suppose that some drivers are afraid to get ahead of a marked police vehicle.
If everyone were to leave sufficient following distance, and that's material for another column, there wouldn't be any difficulty in staggering your position in relation to other vehicles around you. In the event you or the other driver had to take evasive action there is a place to go instead of colliding with the vehicle beside you. There would also be enough room to stay out of other driver's blind spots, which is a dangerous place to be if they change lanes and don't shoulder check.
Choose a spot between rather than within clusters of vehicles if traffic is light enough to do so. If not, keep your eyes moving and try to anticipate problems before they occur. Hopefully then you won't need the space.