At the same time, various products are commercially available that can be used for cost-effective monitoring of energy use, with different possibilities for feedback to the consumer. The challenge now is to make good use of all possible benefits. How do you prevent an abundance of substantive information and how do we ensure that the end-users of ICT-based tools start using these solutions. Energy or environment as such are, in general, not the most appealing drivers for changing the user's behaviour. On the other hand, the combination of information on energy consumption and behavior patterns with other relevant information, such as the actual quality of the indoor environment, personal health, possibly in combination with other 'life-style' information, is very useful to arouse consumer interest. And, perhaps more importantly, this solution can motivate them to maintain their new, more energy-conscious habits in the long run.