Aerobic exercise is any activity that forces the heart and lungs to work harder to enable the heart and lungs to pump more oxygen to the body. Aerobic exercise facilitates the circulation of oxygen in the blood. When you talk about "everyday" exercises, you can turn many household chores into aerobic activities. You mentioned shoveling snow as one. Another could be vacuuming. If you move your arms and legs quickly while doing so--avoiding any sleeping dogs or cats--you will be turning a chore into an aerobic exercise, as long as you do it for at least twenty minutes. You could also try walking briskly up and down your stairs to get the same effect. The most effective aerobic activities are the ones which increase your heart rate enough to move you into your "target zone." I have included a site below which will show you how to calculate that zone for you. It depends on your age and fitness level. By the way, be sure to consult a physician before undertaking an aerobic program if you have any health problems. Stair climbing, swimming, cross- country skiing, running, bicycling, even walking, will do the trick for you. The best ones are the ones which utilize your whole body, such as swimming and cross- country skiing. I love long-distance unicycling, but this is not for everybody. You use your legs for propulsion, your arms for balance, your mid-section for balance. The best one for you will be the one you enjoy and can stick with. All the best to you. Aerobic exercise brings oxygen to the brain too, so you will find that regular participation will help you think more clearly too.