I've been trying to replace all my worry with gratitude. It's slow going replacing all those neural pathways that slide down into the muck. Most often, I find myself in those old habits rather than feeling grateful. There is also the compounded problem of 'fake it till you make it', because before I started practicing I didn't even know if I had ever genuinely felt a moment of gratitude in my life. It is my experience, however, that faking it till I made it worked in this instance. One of those moments of genuine gratitude is worth years of effort.