Where's My Fire

Why can't I seem to have that same fire and intensity that I started out exercising with all year long? I seem to have lost it somewhere and I'm having a hard time getting it back. Although I kept it longer than usual, I have found myself slacking off from exercising as much as I use to and sneaking in some candy more than I use to. It's like I decided to take a break one weekend and it has lasted a month. I do seem to bounce back for a few days, but then I'm right back to eating junk and sitting on the couch. I guess it's going to take me slowly easing back into my routine again instead of trying to jump head first. I'm sure I can do it. I just need whatever motivation that got me going in the beginning to kick start me again.