Shoveling snow is great exercise. The Japanese even
developed a science around it. (Just scroll down and look at the pictures.)
Unfortunately, although incredibly important to your health, exercise does NOT make you lose weight! That is a total myth.
Science in Europe and the USA has determined that the #1 problem regarding weight is added sugar, in any of its forms. The absolute best way to lose weight is to consume less sugar. Sugar can exacerbate hypertension and causes inflammation. The body prefers to convert it straight into fat as opposed to metabolizing it.
Reduce your daily caloric intake by reducing the amount of added sugar you consume in order to lose weight. There's no real other way. Also you can NOT replace the added sugar with artificial sweeteners. This will change the composition if the bacteria in your stomach and make it more efficient at extracting sugar from OTHER foods. Artificial sweeteners such as Splenda or Sweet-n-Low CONTRIBUTE to obesity and weight gain because of this effect. Zero calorie diet sodas are therefore out of the picture as well.
I don't have a good ability to like resist sugary foods made available to me, I will eat them, but I am able to purposefully NOT buy them. I no longer buy cookies or ice cream or sugary drinks or candies, and when I go out to eat 95% of the time I ask for water which also saves me money.
I buy peanut butter that has nothing added to it, the kind that is straight peanuts. The only cereal I buy is shredded wheat which has no sugar or high-fructose corn syrup added to it. I look at the label to see what I'm getting for just about everything I buy.