This must sound like an impractical advice when people around seem to be struggling to make ends meets. And yet, it is a very useful habit to cultivate. It is not just about the lump sum amount of money you get at the end, it is much more than that.
Saving money teaches you the important of frugality. It also teaches you that instant gratification is not always the way to go. It also teaches you that it takes a lot of small measures to accomplish something big. Saving a dollar a day may not seem like a big enough deal, but try it to find out.