Aside from what
@K'Lee said above, which is really great advice, I would just get used to paying attention to the timers on HITs, if you don't already. Knowing how long a HIT's timer is, as well as maybe having an idea of how long it would take you to clear a queue of them, can save you a lot of trouble as you decide whether or not to start panda'ing a batch. Especially in the case of HITs like Endor HITs that lock you out when a HIT expires, you don't want so many in queue that you can't finish them all before they start expiring. Then you can either set a queue limit on them or slow down your panda timer to compensate.