The My Verizon app lets me monitor my usage. If it warned me when I thought I was getting close that might do the trick. Now, if I'm tethering a bunch of X-Boxes and not paying attention to my phone...well, I guess I'll pay more attention next month, won't I ? Better yet, data traffic stops and I have an option to upgrade my plan for the rest of the month, leave data off until the end of the month, or pay the higher rate. All speculation at this stage of how they will implement it. I'm sure we'll be hearing more in the days to come.