General cooking tips
Try Eating Raw Food : Your body needs time to adjust and clean itself. Start including more fresh fruit, green salad, and green juice in your meals. Cut back on meat, dairy products, and cooked starchy foods. Try eating all raw one day per week, then two days. Or eat only two cooked foods per meal, then only one. You'll feel the difference.
Buy Local Food : ...but at the same time, figure out what makes sense. It is more energy efficient to raise lambs in New Zealand and ship them to the UK than to raise them in the UK, because New Zealand lamb farming is more energy efficient. It is also more energy efficient to buy produce raised in Spain, than produce that has to be grown in greenhouses in the UK. Baby steps require figuring out which things make sense and which don't.
Buying an Oven : In gas appliances, look for blue flames; yellow flames indicate the gas is burning inefficiently and an adjustment may be needed. Consult your manufacturer or your local utility.