Your posts should be descriptive and engage with those of your teammates. Long posts are often epic but this can be done in short posts as well. Example:
"Taking advantage of the distractions created by Bob the Fighter's mighty strikes, Jim the Rogue deftly strikes at their beleaguered adversary, his dagger seeking a vital organ. Dice rolls."
Further, posts should push the action along. In combat, this may be as simple as taking your turn. Out of combat, it may be more complex but it's still pretty easy. Example:
"I hate that wizard! Jim the Rogue exclaims. He turns to Bob the Figher How can we kill him?"
The above example advances the action and prompts teammates to join in while the below example
"I hate that wizard! Jim the Rogue exclaims."
doesn't advance the action and promote engagement nearly as much.
Posting will be expected to occur roughly once per weekday and once on weekends. Players may let me know ahead of time when exceptions come up.