Always cover pots and pans when using your hob so you don't lose heat unnecessarily.
Use your microwave, which can quickly cook something and use less energy than a conventional oven or hob.
Use a slow cooker, a delicious and healthy stew can be made simply using a slow cooker that uses much less energy than a conventional oven or hob.
Use bigger pans, with more surface area on the hob food heats up quicker, using less energy.
Use a tiered steamer, the energy from one hob can heat up 2 or 3 pots worth of food in one go. Saving energy when compared to using a hob for each.