Misfirings from my Neurons

One of the hardest thing I've found to GM in my PBEM is player's declaring and sequencing actions when in motion (unless on the back of fast flying elementals aka Wind Steeds). And sequencing those actions relative to distances from other targets that may or may not be aware or in motion.

The key - getting the players to state the order of actions -and- any distance codifiers (I turn when 300 yards from bad guy and start to accelerate and circle right for example). It may require several iterations of emails before the sequence is flat - but when it is, there shouldn't be any complaints or needs to retcon later.