Motivating your employees to save energy is a low cost way to reduce your consumption. Awareness and incentives are two simple ways to improve motivation.
Make employees aware of the benefits of saving energy by creating an awareness campaign. This could include emails and noticeboards with usage facts, as well as energy saving tips. Posters and labelling with reminders are also helpful. Include energy usage and any goals in meetings.
Offering a financial reward to employees who do a lot to save energy, or come up with an energy saving strategy can be a big motivator.
Another option is to have an office party/day out if a certain energy reduction target is reached.