General cooking tips
Oven Tips : With conventional ovens, minimize the preheating time. Unless you're baking breads or pastries, you may not even need to preheat.
Buy Local Food : See if you can find out where your food has gone before it gets to your plate. You may be suprised by the results. Often it will make financial sense for companies to transport food enourmous distances by planes, boats and lorries. This dosn't take the environmental cost into account (which of course is likely to lead to greatly increased economic costs in the long term).
One of the best elements of travelling is sampling local delicacies, so please don't order a burger and chips when you are in India - not only is the meat likely to be of a poor quality (sometimes so poor that it will make you sick), but you are turning down some of the most wonderful food in the world - and possibly offending your hosts.