Punishment/ Spanking
One of the challenges of keeping him actually "on his toes" is getting him "into caracter".
You will use punishments to wipe that smug smile of his face!
Set up two punishment plays that you will use if he misbehaves or doesn't commit.
These you can change as you see fit, but here are two examples.
The purpose of a "set punishment" is that he will understand there are consequences. You should make the punishment so hard that he actually fears them... That will make him take quicker decisions and follow you without thinking.
So, start of rough, and continue to increase....!
1-
Spanking
Abort the scene and make him get out of position. Tell him to bend over chair/sofa/bed/ your knee and start spanking him with your bare hand. Make him count out loud.
first offence - 10, make them hard
second- 10 + 10
third - 10 + 10, then bring out a whip/belt. Make him take 5 hard ones...
The point is making the punishment so hard that he actually fears them... That will make him take quicker decisions and follow you without thinking.
Anal tasks
Put out a few dildos/ buttplugs. Make them increase in size.
Make him insert them between spankings.Make them larger for every offence. Make sure there are dildos there that are to big for him, and dont let him of if he needs dicipline. If it takes him the whole evening, he should insert it if he wants to continue.