Well not much :), obviously first thing is to check the casualties, how many complete plots you have. This is something you can do by checking your target plot directory and see if the number of plots has increased or not. The other think you can look at is the chia client logs, I wrote about it earlier – how to check Chia logs.
On top of that check the plotter logs, to see what was the latest status:
And obviously check the event viewer in Windows or on Linux go and check /var/log/messages.log
Make sure before you start chia you cleanup the temp disks (I usually just go and do a quick format).