It´s trivial but it's true: you can save a lot of energy simply by turning off equipment after use.
But trivial doesn´t necessarily mean easy!
So: what can you do to make it easier?
Use friendly reminders: put signs and stickers on equipment to remind you and your lab mates to turn it off after use.
Discuss with your lab mates which equipment can be turned off overnight and make an agreement that the last person leaving the lab checks if those appliances have been turned off.
Use outlet timers to automatically turn the equipment off at specific times -- for example at the end of each day.
Outlet timers are super cheap, so it´s a great investment: you will get a lower energy bill and the planet will love you.