The more often you reinforce the habit of comforting yourself in more productive ways the happier you'll be with yourself.

Really something worth just repeating over and over, maybe a poster on every wall in your house. :)

Applicable to so many things that we try to change our lives but in the end just decide to quit trying to quit, that is why I like that you say "the more often you" do it gets the message across that yes you won't be able to do more than one or two blocks, but in the long term you will do a whole marathon.