If a 5 minute shower is alien to residents in your household this clever hourglass shaped shower timer from Ecosavers might be able to act as a very useful training guide.
Treat showering as a game. Complete showering before the all the sand in the showertimer has reached the bottom of the hourglass and you break the 5 minute showering milestone.
More importantly however water is conserved and the energy costs of heating the water for showering can be reduced significantly.
With water rates on the horizon 5 minute showers are the future!