It's kinda funny, success (well sort of)

You know I find it kinda of funny with some success. I have been working on, and off, of my weight loss for a couple of years now. Going down then up then down and so on. But after we came back from summer vacation and I was riding the weight gain train and it was time once again to do something. I pretty much jumped right into Insanity and ate very good for 60 days. Went from 289 lbs to 267 lbs, lost 5 inches of my waist, and so on and so with the good stuff. And in the last 2 years I am down from around 320 lbs. But I put so much work and effort into the 60 days that I never really thought about, or more importantly prepared, for what to do after. I primarily workout at home, and we have a family trip to Disneyland coming up in 4 weeks. So, my plan was to do a P90X/Insanity hybrid program but the trip would break it up the routine. I know there are other workouts (Hip Hop Abs, 30 Day Shred, etc.) that are 4 weeks, but I seem to come up with all sorts of excuses to not do them (I did try one workout of Hip Hop Abs, barely got a sweat on). How could a person go from completely motivated, into it the change, blah, blah, blah, and go to completely opposite. I have done barely anything for 3 days and eaten like there is no tomorrow. Anyone else, experienced this.