I am a believer in long showers, because to I think it feels more natural to have a longer "rain." I do have a very capable drainage system set up though, which is the only reason I can do this. Otherwise, lots of smaller 1-2 minute mistings will have to do.
Mine is:
7:30 - lights on
8:00 - 20 minute shower
1:00 - 5 minute shower
4:00 - 15 minute shower
5:30 - lights out
This has been working really well for all my chameleons, because all of mine really love water. Then humidity is tweaked between species with plants or other things like that.